diff --git a/RGB.NET.Devices.CoolerMaster/CoolerMasterDeviceProvider.cs b/RGB.NET.Devices.CoolerMaster/CoolerMasterDeviceProvider.cs
index 95c3e20..f091ed3 100644
--- a/RGB.NET.Devices.CoolerMaster/CoolerMasterDeviceProvider.cs
+++ b/RGB.NET.Devices.CoolerMaster/CoolerMasterDeviceProvider.cs
@@ -104,20 +104,20 @@ namespace RGB.NET.Devices.CoolerMaster
 
                 foreach (CoolerMasterDevicesIndexes index in Enum.GetValues(typeof(CoolerMasterDevicesIndexes)))
                 {
-
                     try
                     {
-                        _CoolerMasterSDK.SetControlDevice(index);
-                        if (_CoolerMasterSDK.IsDevicePlugged())
+                        RGBDeviceType deviceType = index.GetDeviceType();
+                        if (deviceType == RGBDeviceType.None) continue;
+                        
+                        if (_CoolerMasterSDK.IsDevicePlugged(index))
                         {
-                            RGBDeviceType deviceType = index.GetDeviceType();
                             if (!loadFilter.HasFlag(deviceType)) continue;
 
                             ICoolerMasterRGBDevice device;
                             switch (deviceType)
                             {
                                 case RGBDeviceType.Keyboard:
-                                    CoolerMasterPhysicalKeyboardLayout physicalLayout = _CoolerMasterSDK.GetDeviceLayout();
+                                    CoolerMasterPhysicalKeyboardLayout physicalLayout = _CoolerMasterSDK.GetDeviceLayout(index);
                                     device = new CoolerMasterKeyboardRGBDevice(new CoolerMasterKeyboardRGBDeviceInfo(index, physicalLayout, GetCulture()));
                                     break;
 
@@ -132,7 +132,7 @@ namespace RGB.NET.Devices.CoolerMaster
                                         continue;
                             }
 
-                            _CoolerMasterSDK.EnableLedControl(true);
+                            _CoolerMasterSDK.EnableLedControl(true, index);
 
                             device.Initialize(UpdateTrigger);
                             devices.Add(device);
@@ -165,9 +165,8 @@ namespace RGB.NET.Devices.CoolerMaster
                     try
                     {
                         CoolerMasterRGBDeviceInfo deviceInfo = (CoolerMasterRGBDeviceInfo)device.DeviceInfo;
-                        _CoolerMasterSDK.SetControlDevice(deviceInfo.DeviceIndex);
-                        _CoolerMasterSDK.EnableLedControl(false);
-                        _CoolerMasterSDK.EnableLedControl(true);
+                        _CoolerMasterSDK.EnableLedControl(false, deviceInfo.DeviceIndex);
+                        _CoolerMasterSDK.EnableLedControl(true, deviceInfo.DeviceIndex);
                     }
                     catch {/* shit happens */}
                 }
@@ -182,8 +181,7 @@ namespace RGB.NET.Devices.CoolerMaster
                     try
                     {
                         CoolerMasterRGBDeviceInfo deviceInfo = (CoolerMasterRGBDeviceInfo)device.DeviceInfo;
-                        _CoolerMasterSDK.SetControlDevice(deviceInfo.DeviceIndex);
-                        _CoolerMasterSDK.EnableLedControl(false);
+                        _CoolerMasterSDK.EnableLedControl(false, deviceInfo.DeviceIndex);
                     }
                     catch {/* shit happens */}
                 }
diff --git a/RGB.NET.Devices.CoolerMaster/Enum/CoolerMasterDevicesIndexes.cs b/RGB.NET.Devices.CoolerMaster/Enum/CoolerMasterDevicesIndexes.cs
index 46a08a9..cf84cbc 100644
--- a/RGB.NET.Devices.CoolerMaster/Enum/CoolerMasterDevicesIndexes.cs
+++ b/RGB.NET.Devices.CoolerMaster/Enum/CoolerMasterDevicesIndexes.cs
@@ -43,6 +43,33 @@ namespace RGB.NET.Devices.CoolerMaster
 
         [Description("MasterKeys Pro S White")]
         [DeviceType(RGBDeviceType.Keyboard)]
-        MasterKeys_S_White = 7
+        MasterKeys_S_White = 7,
+
+        [Description("MM520")]
+        [DeviceType(RGBDeviceType.Mouse)]
+        MM520 = 8,
+
+        [Description("MM530")]
+        [DeviceType(RGBDeviceType.Mouse)]
+        MM530 = 9,
+
+        [Description("MasterKeys MK750")]
+        [DeviceType(RGBDeviceType.Keyboard)]
+        MasterKeys_MK750 = 10,
+
+        [Description("CK372")]
+        [DeviceType(RGBDeviceType.Keyboard)]
+        CK372 = 11,
+
+        [Description("CK550")]
+        [DeviceType(RGBDeviceType.Keyboard)]
+        CK550 = 12,
+
+        [Description("CK551")]
+        [DeviceType(RGBDeviceType.Keyboard)]
+        CK551 = 13,
+
+        [DeviceType(RGBDeviceType.None)]
+        Default = 0xFFFF
     }
 }
diff --git a/RGB.NET.Devices.CoolerMaster/Enum/CoolerMasterEffects.cs b/RGB.NET.Devices.CoolerMaster/Enum/CoolerMasterEffects.cs
index c40e3f7..c751657 100644
--- a/RGB.NET.Devices.CoolerMaster/Enum/CoolerMasterEffects.cs
+++ b/RGB.NET.Devices.CoolerMaster/Enum/CoolerMasterEffects.cs
@@ -25,6 +25,12 @@ namespace RGB.NET.Devices.CoolerMaster
         Spectrum = 11,
         RapidFire = 12,
         Indicator = 13, //mouse Effect
+        FireBall = 14,
+        WaterRipple = 15,
+        ReactivePunch = 16,
+        Snowing = 17,
+        HeartBeat = 18,
+        ReactiveTornade = 19,
 
         Multi1 = 0xE0,
         Multi2 = 0xE1,
diff --git a/RGB.NET.Devices.CoolerMaster/Enum/CoolerMasterPhysicalKeyboardLayout.cs b/RGB.NET.Devices.CoolerMaster/Enum/CoolerMasterPhysicalKeyboardLayout.cs
index 5dd477c..e89294b 100644
--- a/RGB.NET.Devices.CoolerMaster/Enum/CoolerMasterPhysicalKeyboardLayout.cs
+++ b/RGB.NET.Devices.CoolerMaster/Enum/CoolerMasterPhysicalKeyboardLayout.cs
@@ -12,6 +12,7 @@ namespace RGB.NET.Devices.CoolerMaster
     {
         UNINIT = 0,
         US = 1,
-        EU = 2
+        EU = 2,
+        JP = 3
     }
 }
diff --git a/RGB.NET.Devices.CoolerMaster/Generic/CoolerMasterRGBDevice.cs b/RGB.NET.Devices.CoolerMaster/Generic/CoolerMasterRGBDevice.cs
index 01747d2..c35676e 100644
--- a/RGB.NET.Devices.CoolerMaster/Generic/CoolerMasterRGBDevice.cs
+++ b/RGB.NET.Devices.CoolerMaster/Generic/CoolerMasterRGBDevice.cs
@@ -74,8 +74,7 @@ namespace RGB.NET.Devices.CoolerMaster
         /// <inheritdoc cref="AbstractRGBDevice{TDeviceInfo}.Dispose" />
         public override void Dispose()
         {
-            _CoolerMasterSDK.SetControlDevice(DeviceInfo.DeviceIndex);
-            _CoolerMasterSDK.EnableLedControl(false);
+            _CoolerMasterSDK.EnableLedControl(false, DeviceInfo.DeviceIndex);
 
             base.Dispose();
         }
diff --git a/RGB.NET.Devices.CoolerMaster/Generic/CoolerMasterUpdateQueue.cs b/RGB.NET.Devices.CoolerMaster/Generic/CoolerMasterUpdateQueue.cs
index 1296d87..045b6e4 100644
--- a/RGB.NET.Devices.CoolerMaster/Generic/CoolerMasterUpdateQueue.cs
+++ b/RGB.NET.Devices.CoolerMaster/Generic/CoolerMasterUpdateQueue.cs
@@ -36,15 +36,13 @@ namespace RGB.NET.Devices.CoolerMaster
         /// <inheritdoc />
         protected override void Update(Dictionary<object, Color> dataSet)
         {
-            _CoolerMasterSDK.SetControlDevice(_deviceIndex);
-
             foreach (KeyValuePair<object, Color> data in dataSet)
             {
                 (int row, int column) = ((int, int))data.Key;
-                _CoolerMasterSDK.SetLedColor(row, column, data.Value.R, data.Value.G, data.Value.B);
+                _CoolerMasterSDK.SetLedColor(row, column, data.Value.R, data.Value.G, data.Value.B, _deviceIndex);
             }
 
-            _CoolerMasterSDK.RefreshLed(false);
+            _CoolerMasterSDK.RefreshLed(false, _deviceIndex);
         }
 
         #endregion
diff --git a/RGB.NET.Devices.CoolerMaster/Keyboard/CoolerMasterKeyboardLedMappings.cs b/RGB.NET.Devices.CoolerMaster/Keyboard/CoolerMasterKeyboardLedMappings.cs
index 0febc0f..57548f1 100644
--- a/RGB.NET.Devices.CoolerMaster/Keyboard/CoolerMasterKeyboardLedMappings.cs
+++ b/RGB.NET.Devices.CoolerMaster/Keyboard/CoolerMasterKeyboardLedMappings.cs
@@ -655,6 +655,797 @@ namespace RGB.NET.Devices.CoolerMaster
 
         #endregion
 
+        #region MasterKeysMK750
+
+        private static readonly Dictionary<LedId, (int row, int column)> MasterKeysMK750_US = new Dictionary<LedId, (int row, int column)>
+        {
+            { LedId.Keyboard_Escape, (0,0) },
+            { LedId.Keyboard_F1, (0,1) },
+            { LedId.Keyboard_F2, (0,2) },
+            { LedId.Keyboard_F3, (0,3) },
+            { LedId.Keyboard_F4, (0,4) },
+            { LedId.Keyboard_F5, (0,6) },
+            { LedId.Keyboard_F6, (0,7) },
+            { LedId.Keyboard_F7, (0,8) },
+            { LedId.Keyboard_F8, (0,9) },
+            { LedId.Keyboard_F9, (0,11) },
+            { LedId.Keyboard_F10, (0,12) },
+            { LedId.Keyboard_F11, (0,13) },
+            { LedId.Keyboard_F12, (0,14) },
+            { LedId.Keyboard_PrintScreen, (0,15) },
+            { LedId.Keyboard_ScrollLock, (0,16) },
+            { LedId.Keyboard_PauseBreak, (0,17) },
+            { LedId.Keyboard_Programmable1, (0,18) },
+            { LedId.Keyboard_Programmable2, (0,19) },
+            { LedId.Keyboard_Programmable3, (0,20) },
+            { LedId.Keyboard_Programmable4, (0,21) },
+            { LedId.Keyboard_Custom1, (0,22) },
+            { LedId.Keyboard_Custom23, (0,23) },
+
+            { LedId.Keyboard_GraveAccentAndTilde, (1,0) },
+            { LedId.Keyboard_1, (1,1) },
+            { LedId.Keyboard_2, (1,2) },
+            { LedId.Keyboard_3, (1,3) },
+            { LedId.Keyboard_4, (1,4) },
+            { LedId.Keyboard_5, (1,5) },
+            { LedId.Keyboard_6, (1,6) },
+            { LedId.Keyboard_7, (1,7) },
+            { LedId.Keyboard_8, (1,8) },
+            { LedId.Keyboard_9, (1,9) },
+            { LedId.Keyboard_0, (1,10) },
+            { LedId.Keyboard_MinusAndUnderscore, (1,11) },
+            { LedId.Keyboard_EqualsAndPlus, (1,12) },
+            { LedId.Keyboard_Backspace, (1,14) },
+            { LedId.Keyboard_Insert, (1,15) },
+            { LedId.Keyboard_Home, (1,16) },
+            { LedId.Keyboard_PageUp, (1,17) },
+            { LedId.Keyboard_NumLock, (1,18) },
+            { LedId.Keyboard_NumSlash, (1,19) },
+            { LedId.Keyboard_NumAsterisk, (1,20) },
+            { LedId.Keyboard_NumMinus, (1,21) },
+            { LedId.Keyboard_Custom2, (1,22) },
+            { LedId.Keyboard_Custom24, (1,23) },
+
+            { LedId.Keyboard_Tab, (2,0) },
+            { LedId.Keyboard_Q, (2,1) },
+            { LedId.Keyboard_W, (2,2) },
+            { LedId.Keyboard_E, (2,3) },
+            { LedId.Keyboard_R, (2,4) },
+            { LedId.Keyboard_T, (2,5) },
+            { LedId.Keyboard_Y, (2,6) },
+            { LedId.Keyboard_U, (2,7) },
+            { LedId.Keyboard_I, (2,8) },
+            { LedId.Keyboard_O, (2,9) },
+            { LedId.Keyboard_P, (2,10) },
+            { LedId.Keyboard_BracketLeft, (2,11) },
+            { LedId.Keyboard_BracketRight, (2,12) },
+            { LedId.Keyboard_Backslash, (2,14) },
+            { LedId.Keyboard_Delete, (2,15) },
+            { LedId.Keyboard_End, (2,16) },
+            { LedId.Keyboard_PageDown, (2,17) },
+            { LedId.Keyboard_Num7, (2,18) },
+            { LedId.Keyboard_Num8, (2,19) },
+            { LedId.Keyboard_Num9, (2,20) },
+            { LedId.Keyboard_NumPlus, (2,21) },
+            { LedId.Keyboard_Custom3, (2,22) },
+            { LedId.Keyboard_Custom25, (2,23) },
+
+            { LedId.Keyboard_CapsLock, (3,0) },
+            { LedId.Keyboard_A, (3,1) },
+            { LedId.Keyboard_S, (3,2) },
+            { LedId.Keyboard_D, (3,3) },
+            { LedId.Keyboard_F, (3,4) },
+            { LedId.Keyboard_G, (3,5) },
+            { LedId.Keyboard_H, (3,6) },
+            { LedId.Keyboard_J, (3,7) },
+            { LedId.Keyboard_K, (3,8) },
+            { LedId.Keyboard_L, (3,9) },
+            { LedId.Keyboard_SemicolonAndColon, (3,10) },
+            { LedId.Keyboard_ApostropheAndDoubleQuote, (3,11) },
+            { LedId.Keyboard_Enter, (3,14) },
+            { LedId.Keyboard_Num4, (3,18) },
+            { LedId.Keyboard_Num5, (3,19) },
+            { LedId.Keyboard_Num6, (3,20) },
+            { LedId.Keyboard_Custom4, (3,22) },
+            { LedId.Keyboard_Custom26, (3,23) },
+
+            { LedId.Keyboard_LeftShift, (4,0) },
+            { LedId.Keyboard_Z, (4,2) },
+            { LedId.Keyboard_X, (4,3) },
+            { LedId.Keyboard_C, (4,4) },
+            { LedId.Keyboard_V, (4,5) },
+            { LedId.Keyboard_B, (4,6) },
+            { LedId.Keyboard_N, (4,7) },
+            { LedId.Keyboard_M, (4,8) },
+            { LedId.Keyboard_CommaAndLessThan, (4,9) },
+            { LedId.Keyboard_PeriodAndBiggerThan, (4,10) },
+            { LedId.Keyboard_SlashAndQuestionMark, (4,11) },
+            { LedId.Keyboard_RightShift, (4,14) },
+            { LedId.Keyboard_ArrowUp, (4,16) },
+            { LedId.Keyboard_Num1, (4,18) },
+            { LedId.Keyboard_Num2, (4,19) },
+            { LedId.Keyboard_Num3, (4,20) },
+            { LedId.Keyboard_NumEnter, (4,21) },
+
+            { LedId.Keyboard_LeftCtrl, (5,0) },
+            { LedId.Keyboard_LeftGui, (5,1) },
+            { LedId.Keyboard_LeftAlt, (5,2) },
+            { LedId.Keyboard_Space, (5,6) },
+            { LedId.Keyboard_RightAlt, (5,10) },
+            { LedId.Keyboard_RightGui, (5,11) },
+            { LedId.Keyboard_Application, (5,12) },
+            { LedId.Keyboard_RightCtrl, (5,14) },
+            { LedId.Keyboard_ArrowLeft, (5,15) },
+            { LedId.Keyboard_ArrowDown, (5,16) },
+            { LedId.Keyboard_ArrowRight, (5,17) },
+            { LedId.Keyboard_Num0, (5,18) },
+            { LedId.Keyboard_NumPeriodAndDelete, (5,20) },
+
+            { LedId.Keyboard_Custom5, (6,0) },
+            { LedId.Keyboard_Custom6, (6,1) },
+            { LedId.Keyboard_Custom7, (6,2) },
+            { LedId.Keyboard_Custom8, (6,3) },
+            { LedId.Keyboard_Custom9, (6,4) },
+            { LedId.Keyboard_Custom10, (6,5) },
+            { LedId.Keyboard_Custom11, (6,6) },
+            { LedId.Keyboard_Custom12, (6,7) },
+            { LedId.Keyboard_Custom13, (6,8) },
+            { LedId.Keyboard_Custom14, (6,9) },
+            { LedId.Keyboard_Custom15, (6,10) },
+            { LedId.Keyboard_Custom16, (6,11) },
+            { LedId.Keyboard_Custom17, (6,12) },
+            { LedId.Keyboard_Custom18, (6,13) },
+            { LedId.Keyboard_Custom19, (6,14) },
+            { LedId.Keyboard_Custom20, (6,15) },
+            { LedId.Keyboard_Custom21, (6,16) },
+            { LedId.Keyboard_Custom22, (6,17) },
+        };
+
+        private static readonly Dictionary<LedId, (int row, int column)> MasterKeysMK750_EU = new Dictionary<LedId, (int row, int column)>
+        {
+            { LedId.Keyboard_Escape, (0,0) },
+            { LedId.Keyboard_F1, (0,1) },
+            { LedId.Keyboard_F2, (0,2) },
+            { LedId.Keyboard_F3, (0,3) },
+            { LedId.Keyboard_F4, (0,4) },
+            { LedId.Keyboard_F5, (0,6) },
+            { LedId.Keyboard_F6, (0,7) },
+            { LedId.Keyboard_F7, (0,8) },
+            { LedId.Keyboard_F8, (0,9) },
+            { LedId.Keyboard_F9, (0,11) },
+            { LedId.Keyboard_F10, (0,12) },
+            { LedId.Keyboard_F11, (0,13) },
+            { LedId.Keyboard_F12, (0,14) },
+            { LedId.Keyboard_PrintScreen, (0,15) },
+            { LedId.Keyboard_ScrollLock, (0,16) },
+            { LedId.Keyboard_PauseBreak, (0,17) },
+            { LedId.Keyboard_Programmable1, (0,18) },
+            { LedId.Keyboard_Programmable2, (0,19) },
+            { LedId.Keyboard_Programmable3, (0,20) },
+            { LedId.Keyboard_Programmable4, (0,21) },
+            { LedId.Keyboard_Custom1, (0,22) },
+            { LedId.Keyboard_Custom23, (0,23) },
+
+            { LedId.Keyboard_GraveAccentAndTilde, (1,0) },
+            { LedId.Keyboard_1, (1,1) },
+            { LedId.Keyboard_2, (1,2) },
+            { LedId.Keyboard_3, (1,3) },
+            { LedId.Keyboard_4, (1,4) },
+            { LedId.Keyboard_5, (1,5) },
+            { LedId.Keyboard_6, (1,6) },
+            { LedId.Keyboard_7, (1,7) },
+            { LedId.Keyboard_8, (1,8) },
+            { LedId.Keyboard_9, (1,9) },
+            { LedId.Keyboard_0, (1,10) },
+            { LedId.Keyboard_MinusAndUnderscore, (1,11) },
+            { LedId.Keyboard_EqualsAndPlus, (1,12) },
+            { LedId.Keyboard_Backspace, (1,14) },
+            { LedId.Keyboard_Insert, (1,15) },
+            { LedId.Keyboard_Home, (1,16) },
+            { LedId.Keyboard_PageUp, (1,17) },
+            { LedId.Keyboard_NumLock, (1,18) },
+            { LedId.Keyboard_NumSlash, (1,19) },
+            { LedId.Keyboard_NumAsterisk, (1,20) },
+            { LedId.Keyboard_NumMinus, (1,21) },
+            { LedId.Keyboard_Custom2, (1,22) },
+            { LedId.Keyboard_Custom24, (1,23) },
+
+            { LedId.Keyboard_Tab, (2,0) },
+            { LedId.Keyboard_Q, (2,1) },
+            { LedId.Keyboard_W, (2,2) },
+            { LedId.Keyboard_E, (2,3) },
+            { LedId.Keyboard_R, (2,4) },
+            { LedId.Keyboard_T, (2,5) },
+            { LedId.Keyboard_Y, (2,6) },
+            { LedId.Keyboard_U, (2,7) },
+            { LedId.Keyboard_I, (2,8) },
+            { LedId.Keyboard_O, (2,9) },
+            { LedId.Keyboard_P, (2,10) },
+            { LedId.Keyboard_BracketLeft, (2,11) },
+            { LedId.Keyboard_BracketRight, (2,12) },
+            { LedId.Keyboard_Enter, (2,14) },
+            { LedId.Keyboard_Delete, (2,15) },
+            { LedId.Keyboard_End, (2,16) },
+            { LedId.Keyboard_PageDown, (2,17) },
+            { LedId.Keyboard_Num7, (2,18) },
+            { LedId.Keyboard_Num8, (2,19) },
+            { LedId.Keyboard_Num9, (2,20) },
+            { LedId.Keyboard_NumPlus, (2,21) },
+            { LedId.Keyboard_Custom3, (2,22) },
+            { LedId.Keyboard_Custom25, (2,23) },
+
+            { LedId.Keyboard_CapsLock, (3,0) },
+            { LedId.Keyboard_A, (3,1) },
+            { LedId.Keyboard_S, (3,2) },
+            { LedId.Keyboard_D, (3,3) },
+            { LedId.Keyboard_F, (3,4) },
+            { LedId.Keyboard_G, (3,5) },
+            { LedId.Keyboard_H, (3,6) },
+            { LedId.Keyboard_J, (3,7) },
+            { LedId.Keyboard_K, (3,8) },
+            { LedId.Keyboard_L, (3,9) },
+            { LedId.Keyboard_SemicolonAndColon, (3,10) },
+            { LedId.Keyboard_ApostropheAndDoubleQuote, (3,11) },
+            { LedId.Keyboard_NonUsTilde, (3,12) },
+            { LedId.Keyboard_Num4, (3,18) },
+            { LedId.Keyboard_Num5, (3,19) },
+            { LedId.Keyboard_Num6, (3,20) },
+            { LedId.Keyboard_Custom4, (3,22) },
+            { LedId.Keyboard_Custom26, (3,23) },
+
+            { LedId.Keyboard_LeftShift, (4,0) },
+            { LedId.Keyboard_NonUsBackslash, (4,1) },
+            { LedId.Keyboard_Z, (4,2) },
+            { LedId.Keyboard_X, (4,3) },
+            { LedId.Keyboard_C, (4,4) },
+            { LedId.Keyboard_V, (4,5) },
+            { LedId.Keyboard_B, (4,6) },
+            { LedId.Keyboard_N, (4,7) },
+            { LedId.Keyboard_M, (4,8) },
+            { LedId.Keyboard_CommaAndLessThan, (4,9) },
+            { LedId.Keyboard_PeriodAndBiggerThan, (4,10) },
+            { LedId.Keyboard_SlashAndQuestionMark, (4,11) },
+            { LedId.Keyboard_RightShift, (4,14) },
+            { LedId.Keyboard_ArrowUp, (4,16) },
+            { LedId.Keyboard_Num1, (4,18) },
+            { LedId.Keyboard_Num2, (4,19) },
+            { LedId.Keyboard_Num3, (4,20) },
+            { LedId.Keyboard_NumEnter, (4,21) },
+
+            { LedId.Keyboard_LeftCtrl, (5,0) },
+            { LedId.Keyboard_LeftGui, (5,1) },
+            { LedId.Keyboard_LeftAlt, (5,2) },
+            { LedId.Keyboard_Space, (5,6) },
+            { LedId.Keyboard_RightAlt, (5,10) },
+            { LedId.Keyboard_RightGui, (5,11) },
+            { LedId.Keyboard_Application, (5,12) },
+            { LedId.Keyboard_RightCtrl, (5,14) },
+            { LedId.Keyboard_ArrowLeft, (5,15) },
+            { LedId.Keyboard_ArrowDown, (5,16) },
+            { LedId.Keyboard_ArrowRight, (5,17) },
+            { LedId.Keyboard_Num0, (5,18) },
+            { LedId.Keyboard_NumPeriodAndDelete, (5,20) },
+
+            { LedId.Keyboard_Custom5, (6,0) },
+            { LedId.Keyboard_Custom6, (6,1) },
+            { LedId.Keyboard_Custom7, (6,2) },
+            { LedId.Keyboard_Custom8, (6,3) },
+            { LedId.Keyboard_Custom9, (6,4) },
+            { LedId.Keyboard_Custom10, (6,5) },
+            { LedId.Keyboard_Custom11, (6,6) },
+            { LedId.Keyboard_Custom12, (6,7) },
+            { LedId.Keyboard_Custom13, (6,8) },
+            { LedId.Keyboard_Custom14, (6,9) },
+            { LedId.Keyboard_Custom15, (6,10) },
+            { LedId.Keyboard_Custom16, (6,11) },
+            { LedId.Keyboard_Custom17, (6,12) },
+            { LedId.Keyboard_Custom18, (6,13) },
+            { LedId.Keyboard_Custom19, (6,14) },
+            { LedId.Keyboard_Custom20, (6,15) },
+            { LedId.Keyboard_Custom21, (6,16) },
+            { LedId.Keyboard_Custom22, (6,17) }
+        };
+
+        private static readonly Dictionary<LedId, (int row, int column)> MasterKeysMK750_JP = new Dictionary<LedId, (int row, int column)>
+        {
+            { LedId.Keyboard_Escape, (0,0) },
+            { LedId.Keyboard_F1, (0,1) },
+            { LedId.Keyboard_F2, (0,2) },
+            { LedId.Keyboard_F3, (0,3) },
+            { LedId.Keyboard_F4, (0,4) },
+            { LedId.Keyboard_F5, (0,6) },
+            { LedId.Keyboard_F6, (0,7) },
+            { LedId.Keyboard_F7, (0,8) },
+            { LedId.Keyboard_F8, (0,9) },
+            { LedId.Keyboard_F9, (0,11) },
+            { LedId.Keyboard_F10, (0,12) },
+            { LedId.Keyboard_F11, (0,13) },
+            { LedId.Keyboard_F12, (0,14) },
+            { LedId.Keyboard_PrintScreen, (0,15) },
+            { LedId.Keyboard_ScrollLock, (0,16) },
+            { LedId.Keyboard_PauseBreak, (0,17) },
+            { LedId.Keyboard_Programmable1, (0,18) },
+            { LedId.Keyboard_Programmable2, (0,19) },
+            { LedId.Keyboard_Programmable3, (0,20) },
+            { LedId.Keyboard_Programmable4, (0,21) },
+            { LedId.Keyboard_Custom1, (0,22) },
+            { LedId.Keyboard_Custom23, (0,23) },
+
+            { LedId.Keyboard_GraveAccentAndTilde, (1,0) },
+            { LedId.Keyboard_1, (1,1) },
+            { LedId.Keyboard_2, (1,2) },
+            { LedId.Keyboard_3, (1,3) },
+            { LedId.Keyboard_4, (1,4) },
+            { LedId.Keyboard_5, (1,5) },
+            { LedId.Keyboard_6, (1,6) },
+            { LedId.Keyboard_7, (1,7) },
+            { LedId.Keyboard_8, (1,8) },
+            { LedId.Keyboard_9, (1,9) },
+            { LedId.Keyboard_0, (1,10) },
+            { LedId.Keyboard_MinusAndUnderscore, (1,11) },
+            { LedId.Keyboard_EqualsAndPlus, (1,12) },
+            { LedId.Keyboard_International1, (1,13) },
+            { LedId.Keyboard_Backspace, (1,14) },
+            { LedId.Keyboard_Insert, (1,15) },
+            { LedId.Keyboard_Home, (1,16) },
+            { LedId.Keyboard_PageUp, (1,17) },
+            { LedId.Keyboard_NumLock, (1,18) },
+            { LedId.Keyboard_NumSlash, (1,19) },
+            { LedId.Keyboard_NumAsterisk, (1,20) },
+            { LedId.Keyboard_NumMinus, (1,21) },
+            { LedId.Keyboard_Custom2, (1,22) },
+            { LedId.Keyboard_Custom24, (1,23) },
+
+            { LedId.Keyboard_Tab, (2,0) },
+            { LedId.Keyboard_Q, (2,1) },
+            { LedId.Keyboard_W, (2,2) },
+            { LedId.Keyboard_E, (2,3) },
+            { LedId.Keyboard_R, (2,4) },
+            { LedId.Keyboard_T, (2,5) },
+            { LedId.Keyboard_Y, (2,6) },
+            { LedId.Keyboard_U, (2,7) },
+            { LedId.Keyboard_I, (2,8) },
+            { LedId.Keyboard_O, (2,9) },
+            { LedId.Keyboard_P, (2,10) },
+            { LedId.Keyboard_BracketLeft, (2,11) },
+            { LedId.Keyboard_BracketRight, (2,12) },
+            { LedId.Keyboard_Enter, (2,14) },
+            { LedId.Keyboard_Delete, (2,15) },
+            { LedId.Keyboard_End, (2,16) },
+            { LedId.Keyboard_PageDown, (2,17) },
+            { LedId.Keyboard_Num7, (2,18) },
+            { LedId.Keyboard_Num8, (2,19) },
+            { LedId.Keyboard_Num9, (2,20) },
+            { LedId.Keyboard_NumPlus, (2,21) },
+            { LedId.Keyboard_Custom3, (2,22) },
+            { LedId.Keyboard_Custom25, (2,23) },
+
+            { LedId.Keyboard_CapsLock, (3,0) },
+            { LedId.Keyboard_A, (3,1) },
+            { LedId.Keyboard_S, (3,2) },
+            { LedId.Keyboard_D, (3,3) },
+            { LedId.Keyboard_F, (3,4) },
+            { LedId.Keyboard_G, (3,5) },
+            { LedId.Keyboard_H, (3,6) },
+            { LedId.Keyboard_J, (3,7) },
+            { LedId.Keyboard_K, (3,8) },
+            { LedId.Keyboard_L, (3,9) },
+            { LedId.Keyboard_SemicolonAndColon, (3,10) },
+            { LedId.Keyboard_ApostropheAndDoubleQuote, (3,11) },
+            { LedId.Keyboard_Backslash, (3,14) },
+            { LedId.Keyboard_Num4, (3,18) },
+            { LedId.Keyboard_Num5, (3,19) },
+            { LedId.Keyboard_Num6, (3,20) },
+            { LedId.Keyboard_Custom4, (3,22) },
+            { LedId.Keyboard_Custom26, (3,23) },
+
+            { LedId.Keyboard_LeftShift, (4,0) },
+            { LedId.Keyboard_Z, (4,2) },
+            { LedId.Keyboard_X, (4,3) },
+            { LedId.Keyboard_C, (4,4) },
+            { LedId.Keyboard_V, (4,5) },
+            { LedId.Keyboard_B, (4,6) },
+            { LedId.Keyboard_N, (4,7) },
+            { LedId.Keyboard_M, (4,8) },
+            { LedId.Keyboard_CommaAndLessThan, (4,9) },
+            { LedId.Keyboard_PeriodAndBiggerThan, (4,10) },
+            { LedId.Keyboard_SlashAndQuestionMark, (4,11) },
+            { LedId.Keyboard_International2, (4,12) },
+            { LedId.Keyboard_RightShift, (4,14) },
+            { LedId.Keyboard_ArrowUp, (4,16) },
+            { LedId.Keyboard_Num1, (4,18) },
+            { LedId.Keyboard_Num2, (4,19) },
+            { LedId.Keyboard_Num3, (4,20) },
+            { LedId.Keyboard_NumEnter, (4,21) },
+
+            { LedId.Keyboard_LeftCtrl, (5,0) },
+            { LedId.Keyboard_LeftGui, (5,1) },
+            { LedId.Keyboard_LeftAlt, (5,2) },
+            { LedId.Keyboard_International3, (5,4) },
+            { LedId.Keyboard_Space, (5,6) },
+            { LedId.Keyboard_International4, (5,8) },
+            { LedId.Keyboard_International5, (5,9) },
+            { LedId.Keyboard_RightAlt, (5,10) },
+            { LedId.Keyboard_RightGui, (5,11) },
+            { LedId.Keyboard_Application, (5,12) },
+            { LedId.Keyboard_RightCtrl, (5,14) },
+            { LedId.Keyboard_ArrowLeft, (5,15) },
+            { LedId.Keyboard_ArrowDown, (5,16) },
+            { LedId.Keyboard_ArrowRight, (5,17) },
+            { LedId.Keyboard_Num0, (5,18) },
+            { LedId.Keyboard_NumPeriodAndDelete, (5,20) },
+
+            { LedId.Keyboard_Custom5, (6,0) },
+            { LedId.Keyboard_Custom6, (6,1) },
+            { LedId.Keyboard_Custom7, (6,2) },
+            { LedId.Keyboard_Custom8, (6,3) },
+            { LedId.Keyboard_Custom9, (6,4) },
+            { LedId.Keyboard_Custom10, (6,5) },
+            { LedId.Keyboard_Custom11, (6,6) },
+            { LedId.Keyboard_Custom12, (6,7) },
+            { LedId.Keyboard_Custom13, (6,8) },
+            { LedId.Keyboard_Custom14, (6,9) },
+            { LedId.Keyboard_Custom15, (6,10) },
+            { LedId.Keyboard_Custom16, (6,11) },
+            { LedId.Keyboard_Custom17, (6,12) },
+            { LedId.Keyboard_Custom18, (6,13) },
+            { LedId.Keyboard_Custom19, (6,14) },
+            { LedId.Keyboard_Custom20, (6,15) },
+            { LedId.Keyboard_Custom21, (6,16) },
+            { LedId.Keyboard_Custom22, (6,17) },
+        };
+
+        #endregion
+
+        #region CKxxx
+
+        private static readonly Dictionary<LedId, (int row, int column)> CKxxx_US = new Dictionary<LedId, (int row, int column)>
+        {
+            { LedId.Keyboard_Escape, (0,0) },
+            { LedId.Keyboard_F1, (0,1) },
+            { LedId.Keyboard_F2, (0,2) },
+            { LedId.Keyboard_F3, (0,3) },
+            { LedId.Keyboard_F4, (0,4) },
+            { LedId.Keyboard_F5, (0,6) },
+            { LedId.Keyboard_F6, (0,7) },
+            { LedId.Keyboard_F7, (0,8) },
+            { LedId.Keyboard_F8, (0,9) },
+            { LedId.Keyboard_F9, (0,11) },
+            { LedId.Keyboard_F10, (0,12) },
+            { LedId.Keyboard_F11, (0,13) },
+            { LedId.Keyboard_F12, (0,14) },
+            { LedId.Keyboard_PrintScreen, (0,15) },
+            { LedId.Keyboard_ScrollLock, (0,16) },
+            { LedId.Keyboard_PauseBreak, (0,17) },
+
+            { LedId.Keyboard_GraveAccentAndTilde, (1,0) },
+            { LedId.Keyboard_1, (1,1) },
+            { LedId.Keyboard_2, (1,2) },
+            { LedId.Keyboard_3, (1,3) },
+            { LedId.Keyboard_4, (1,4) },
+            { LedId.Keyboard_5, (1,5) },
+            { LedId.Keyboard_6, (1,6) },
+            { LedId.Keyboard_7, (1,7) },
+            { LedId.Keyboard_8, (1,8) },
+            { LedId.Keyboard_9, (1,9) },
+            { LedId.Keyboard_0, (1,10) },
+            { LedId.Keyboard_MinusAndUnderscore, (1,11) },
+            { LedId.Keyboard_EqualsAndPlus, (1,12) },
+            { LedId.Keyboard_Backspace, (1,14) },
+            { LedId.Keyboard_Insert, (1,15) },
+            { LedId.Keyboard_Home, (1,16) },
+            { LedId.Keyboard_PageUp, (1,17) },
+            { LedId.Keyboard_NumLock, (1,18) },
+            { LedId.Keyboard_NumSlash, (1,19) },
+            { LedId.Keyboard_NumAsterisk, (1,20) },
+            { LedId.Keyboard_NumMinus, (1,21) },
+
+            { LedId.Keyboard_Tab, (2,0) },
+            { LedId.Keyboard_Q, (2,1) },
+            { LedId.Keyboard_W, (2,2) },
+            { LedId.Keyboard_E, (2,3) },
+            { LedId.Keyboard_R, (2,4) },
+            { LedId.Keyboard_T, (2,5) },
+            { LedId.Keyboard_Y, (2,6) },
+            { LedId.Keyboard_U, (2,7) },
+            { LedId.Keyboard_I, (2,8) },
+            { LedId.Keyboard_O, (2,9) },
+            { LedId.Keyboard_P, (2,10) },
+            { LedId.Keyboard_BracketLeft, (2,11) },
+            { LedId.Keyboard_BracketRight, (2,12) },
+            { LedId.Keyboard_Backslash, (2,14) },
+            { LedId.Keyboard_Delete, (2,15) },
+            { LedId.Keyboard_End, (2,16) },
+            { LedId.Keyboard_PageDown, (2,17) },
+            { LedId.Keyboard_Num7, (2,18) },
+            { LedId.Keyboard_Num8, (2,19) },
+            { LedId.Keyboard_Num9, (2,20) },
+            { LedId.Keyboard_NumPlus, (2,21) },
+
+            { LedId.Keyboard_CapsLock, (3,0) },
+            { LedId.Keyboard_A, (3,1) },
+            { LedId.Keyboard_S, (3,2) },
+            { LedId.Keyboard_D, (3,3) },
+            { LedId.Keyboard_F, (3,4) },
+            { LedId.Keyboard_G, (3,5) },
+            { LedId.Keyboard_H, (3,6) },
+            { LedId.Keyboard_J, (3,7) },
+            { LedId.Keyboard_K, (3,8) },
+            { LedId.Keyboard_L, (3,9) },
+            { LedId.Keyboard_SemicolonAndColon, (3,10) },
+            { LedId.Keyboard_ApostropheAndDoubleQuote, (3,11) },
+            { LedId.Keyboard_Enter, (3,14) },
+            { LedId.Keyboard_Num4, (3,18) },
+            { LedId.Keyboard_Num5, (3,19) },
+            { LedId.Keyboard_Num6, (3,20) },
+
+            { LedId.Keyboard_LeftShift, (4,0) },
+            { LedId.Keyboard_Z, (4,2) },
+            { LedId.Keyboard_X, (4,3) },
+            { LedId.Keyboard_C, (4,4) },
+            { LedId.Keyboard_V, (4,5) },
+            { LedId.Keyboard_B, (4,6) },
+            { LedId.Keyboard_N, (4,7) },
+            { LedId.Keyboard_M, (4,8) },
+            { LedId.Keyboard_CommaAndLessThan, (4,9) },
+            { LedId.Keyboard_PeriodAndBiggerThan, (4,10) },
+            { LedId.Keyboard_SlashAndQuestionMark, (4,11) },
+            { LedId.Keyboard_RightShift, (4,14) },
+            { LedId.Keyboard_ArrowUp, (4,16) },
+            { LedId.Keyboard_Num1, (4,18) },
+            { LedId.Keyboard_Num2, (4,19) },
+            { LedId.Keyboard_Num3, (4,20) },
+            { LedId.Keyboard_NumEnter, (4,21) },
+
+            { LedId.Keyboard_LeftCtrl, (5,0) },
+            { LedId.Keyboard_LeftGui, (5,1) },
+            { LedId.Keyboard_LeftAlt, (5,2) },
+            { LedId.Keyboard_Space, (5,6) },
+            { LedId.Keyboard_RightAlt, (5,10) },
+            { LedId.Keyboard_RightGui, (5,11) },
+            { LedId.Keyboard_Application, (5,12) },
+            { LedId.Keyboard_RightCtrl, (5,14) },
+            { LedId.Keyboard_ArrowLeft, (5,15) },
+            { LedId.Keyboard_ArrowDown, (5,16) },
+            { LedId.Keyboard_ArrowRight, (5,17) },
+            { LedId.Keyboard_Num0, (5,18) },
+            { LedId.Keyboard_NumPeriodAndDelete, (5,20) }
+        };
+
+        private static readonly Dictionary<LedId, (int row, int column)> CKxxx_EU = new Dictionary<LedId, (int row, int column)>
+        {
+            { LedId.Keyboard_Escape, (0,0) },
+            { LedId.Keyboard_F1, (0,1) },
+            { LedId.Keyboard_F2, (0,2) },
+            { LedId.Keyboard_F3, (0,3) },
+            { LedId.Keyboard_F4, (0,4) },
+            { LedId.Keyboard_F5, (0,6) },
+            { LedId.Keyboard_F6, (0,7) },
+            { LedId.Keyboard_F7, (0,8) },
+            { LedId.Keyboard_F8, (0,9) },
+            { LedId.Keyboard_F9, (0,11) },
+            { LedId.Keyboard_F10, (0,12) },
+            { LedId.Keyboard_F11, (0,13) },
+            { LedId.Keyboard_F12, (0,14) },
+            { LedId.Keyboard_PrintScreen, (0,15) },
+            { LedId.Keyboard_ScrollLock, (0,16) },
+            { LedId.Keyboard_PauseBreak, (0,17) },
+
+            { LedId.Keyboard_GraveAccentAndTilde, (1,0) },
+            { LedId.Keyboard_1, (1,1) },
+            { LedId.Keyboard_2, (1,2) },
+            { LedId.Keyboard_3, (1,3) },
+            { LedId.Keyboard_4, (1,4) },
+            { LedId.Keyboard_5, (1,5) },
+            { LedId.Keyboard_6, (1,6) },
+            { LedId.Keyboard_7, (1,7) },
+            { LedId.Keyboard_8, (1,8) },
+            { LedId.Keyboard_9, (1,9) },
+            { LedId.Keyboard_0, (1,10) },
+            { LedId.Keyboard_MinusAndUnderscore, (1,11) },
+            { LedId.Keyboard_EqualsAndPlus, (1,12) },
+            { LedId.Keyboard_Backspace, (1,14) },
+            { LedId.Keyboard_Insert, (1,15) },
+            { LedId.Keyboard_Home, (1,16) },
+            { LedId.Keyboard_PageUp, (1,17) },
+            { LedId.Keyboard_NumLock, (1,18) },
+            { LedId.Keyboard_NumSlash, (1,19) },
+            { LedId.Keyboard_NumAsterisk, (1,20) },
+            { LedId.Keyboard_NumMinus, (1,21) },
+
+            { LedId.Keyboard_Tab, (2,0) },
+            { LedId.Keyboard_Q, (2,1) },
+            { LedId.Keyboard_W, (2,2) },
+            { LedId.Keyboard_E, (2,3) },
+            { LedId.Keyboard_R, (2,4) },
+            { LedId.Keyboard_T, (2,5) },
+            { LedId.Keyboard_Y, (2,6) },
+            { LedId.Keyboard_U, (2,7) },
+            { LedId.Keyboard_I, (2,8) },
+            { LedId.Keyboard_O, (2,9) },
+            { LedId.Keyboard_P, (2,10) },
+            { LedId.Keyboard_BracketLeft, (2,11) },
+            { LedId.Keyboard_BracketRight, (2,12) },
+            { LedId.Keyboard_Enter, (2,14) },
+            { LedId.Keyboard_Delete, (2,15) },
+            { LedId.Keyboard_End, (2,16) },
+            { LedId.Keyboard_PageDown, (2,17) },
+            { LedId.Keyboard_Num7, (2,18) },
+            { LedId.Keyboard_Num8, (2,19) },
+            { LedId.Keyboard_Num9, (2,20) },
+            { LedId.Keyboard_NumPlus, (2,21) },
+
+            { LedId.Keyboard_CapsLock, (3,0) },
+            { LedId.Keyboard_A, (3,1) },
+            { LedId.Keyboard_S, (3,2) },
+            { LedId.Keyboard_D, (3,3) },
+            { LedId.Keyboard_F, (3,4) },
+            { LedId.Keyboard_G, (3,5) },
+            { LedId.Keyboard_H, (3,6) },
+            { LedId.Keyboard_J, (3,7) },
+            { LedId.Keyboard_K, (3,8) },
+            { LedId.Keyboard_L, (3,9) },
+            { LedId.Keyboard_SemicolonAndColon, (3,10) },
+            { LedId.Keyboard_ApostropheAndDoubleQuote, (3,11) },
+            { LedId.Keyboard_NonUsTilde, (3,12) },
+            { LedId.Keyboard_Num4, (3,18) },
+            { LedId.Keyboard_Num5, (3,19) },
+            { LedId.Keyboard_Num6, (3,20) },
+
+            { LedId.Keyboard_LeftShift, (4,0) },
+            { LedId.Keyboard_NonUsBackslash, (4,1) },
+            { LedId.Keyboard_Z, (4,2) },
+            { LedId.Keyboard_X, (4,3) },
+            { LedId.Keyboard_C, (4,4) },
+            { LedId.Keyboard_V, (4,5) },
+            { LedId.Keyboard_B, (4,6) },
+            { LedId.Keyboard_N, (4,7) },
+            { LedId.Keyboard_M, (4,8) },
+            { LedId.Keyboard_CommaAndLessThan, (4,9) },
+            { LedId.Keyboard_PeriodAndBiggerThan, (4,10) },
+            { LedId.Keyboard_SlashAndQuestionMark, (4,11) },
+            { LedId.Keyboard_RightShift, (4,14) },
+            { LedId.Keyboard_ArrowUp, (4,16) },
+            { LedId.Keyboard_Num1, (4,18) },
+            { LedId.Keyboard_Num2, (4,19) },
+            { LedId.Keyboard_Num3, (4,20) },
+            { LedId.Keyboard_NumEnter, (4,21) },
+
+            { LedId.Keyboard_LeftCtrl, (5,0) },
+            { LedId.Keyboard_LeftGui, (5,1) },
+            { LedId.Keyboard_LeftAlt, (5,2) },
+            { LedId.Keyboard_Space, (5,6) },
+            { LedId.Keyboard_RightAlt, (5,10) },
+            { LedId.Keyboard_RightGui, (5,11) },
+            { LedId.Keyboard_Application, (5,12) },
+            { LedId.Keyboard_RightCtrl, (5,14) },
+            { LedId.Keyboard_ArrowLeft, (5,15) },
+            { LedId.Keyboard_ArrowDown, (5,16) },
+            { LedId.Keyboard_ArrowRight, (5,17) },
+            { LedId.Keyboard_Num0, (5,18) },
+            { LedId.Keyboard_NumPeriodAndDelete, (5,20) }
+        };
+
+        private static readonly Dictionary<LedId, (int row, int column)> CKxxx_JP = new Dictionary<LedId, (int row, int column)>
+        {
+            { LedId.Keyboard_Escape, (0,0) },
+            { LedId.Keyboard_F1, (0,1) },
+            { LedId.Keyboard_F2, (0,2) },
+            { LedId.Keyboard_F3, (0,3) },
+            { LedId.Keyboard_F4, (0,4) },
+            { LedId.Keyboard_F5, (0,6) },
+            { LedId.Keyboard_F6, (0,7) },
+            { LedId.Keyboard_F7, (0,8) },
+            { LedId.Keyboard_F8, (0,9) },
+            { LedId.Keyboard_F9, (0,11) },
+            { LedId.Keyboard_F10, (0,12) },
+            { LedId.Keyboard_F11, (0,13) },
+            { LedId.Keyboard_F12, (0,14) },
+            { LedId.Keyboard_PrintScreen, (0,15) },
+            { LedId.Keyboard_ScrollLock, (0,16) },
+            { LedId.Keyboard_PauseBreak, (0,17) },
+
+            { LedId.Keyboard_GraveAccentAndTilde, (1,0) },
+            { LedId.Keyboard_1, (1,1) },
+            { LedId.Keyboard_2, (1,2) },
+            { LedId.Keyboard_3, (1,3) },
+            { LedId.Keyboard_4, (1,4) },
+            { LedId.Keyboard_5, (1,5) },
+            { LedId.Keyboard_6, (1,6) },
+            { LedId.Keyboard_7, (1,7) },
+            { LedId.Keyboard_8, (1,8) },
+            { LedId.Keyboard_9, (1,9) },
+            { LedId.Keyboard_0, (1,10) },
+            { LedId.Keyboard_MinusAndUnderscore, (1,11) },
+            { LedId.Keyboard_EqualsAndPlus, (1,12) },
+            { LedId.Keyboard_International1, (1,13) },
+            { LedId.Keyboard_Backspace, (1,14) },
+            { LedId.Keyboard_Insert, (1,15) },
+            { LedId.Keyboard_Home, (1,16) },
+            { LedId.Keyboard_PageUp, (1,17) },
+            { LedId.Keyboard_NumLock, (1,18) },
+            { LedId.Keyboard_NumSlash, (1,19) },
+            { LedId.Keyboard_NumAsterisk, (1,20) },
+            { LedId.Keyboard_NumMinus, (1,21) },
+
+            { LedId.Keyboard_Tab, (2,0) },
+            { LedId.Keyboard_Q, (2,1) },
+            { LedId.Keyboard_W, (2,2) },
+            { LedId.Keyboard_E, (2,3) },
+            { LedId.Keyboard_R, (2,4) },
+            { LedId.Keyboard_T, (2,5) },
+            { LedId.Keyboard_Y, (2,6) },
+            { LedId.Keyboard_U, (2,7) },
+            { LedId.Keyboard_I, (2,8) },
+            { LedId.Keyboard_O, (2,9) },
+            { LedId.Keyboard_P, (2,10) },
+            { LedId.Keyboard_BracketLeft, (2,11) },
+            { LedId.Keyboard_BracketRight, (2,12) },
+            { LedId.Keyboard_Enter, (2,14) },
+            { LedId.Keyboard_Delete, (2,15) },
+            { LedId.Keyboard_End, (2,16) },
+            { LedId.Keyboard_PageDown, (2,17) },
+            { LedId.Keyboard_Num7, (2,18) },
+            { LedId.Keyboard_Num8, (2,19) },
+            { LedId.Keyboard_Num9, (2,20) },
+            { LedId.Keyboard_NumPlus, (2,21) },
+
+            { LedId.Keyboard_CapsLock, (3,0) },
+            { LedId.Keyboard_A, (3,1) },
+            { LedId.Keyboard_S, (3,2) },
+            { LedId.Keyboard_D, (3,3) },
+            { LedId.Keyboard_F, (3,4) },
+            { LedId.Keyboard_G, (3,5) },
+            { LedId.Keyboard_H, (3,6) },
+            { LedId.Keyboard_J, (3,7) },
+            { LedId.Keyboard_K, (3,8) },
+            { LedId.Keyboard_L, (3,9) },
+            { LedId.Keyboard_SemicolonAndColon, (3,10) },
+            { LedId.Keyboard_ApostropheAndDoubleQuote, (3,11) },
+            { LedId.Keyboard_Backslash, (3,14) },
+            { LedId.Keyboard_Num4, (3,18) },
+            { LedId.Keyboard_Num5, (3,19) },
+            { LedId.Keyboard_Num6, (3,20) },
+
+            { LedId.Keyboard_LeftShift, (4,0) },
+            { LedId.Keyboard_Z, (4,2) },
+            { LedId.Keyboard_X, (4,3) },
+            { LedId.Keyboard_C, (4,4) },
+            { LedId.Keyboard_V, (4,5) },
+            { LedId.Keyboard_B, (4,6) },
+            { LedId.Keyboard_N, (4,7) },
+            { LedId.Keyboard_M, (4,8) },
+            { LedId.Keyboard_CommaAndLessThan, (4,9) },
+            { LedId.Keyboard_PeriodAndBiggerThan, (4,10) },
+            { LedId.Keyboard_SlashAndQuestionMark, (4,11) },
+            { LedId.Keyboard_International2, (4,12) },
+            { LedId.Keyboard_RightShift, (4,14) },
+            { LedId.Keyboard_ArrowUp, (4,16) },
+            { LedId.Keyboard_Num1, (4,18) },
+            { LedId.Keyboard_Num2, (4,19) },
+            { LedId.Keyboard_Num3, (4,20) },
+            { LedId.Keyboard_NumEnter, (4,21) },
+
+            { LedId.Keyboard_LeftCtrl, (5,0) },
+            { LedId.Keyboard_LeftGui, (5,1) },
+            { LedId.Keyboard_LeftAlt, (5,2) },
+            { LedId.Keyboard_International3, (5,4) },
+            { LedId.Keyboard_Space, (5,6) },
+            { LedId.Keyboard_International4, (5,8) },
+            { LedId.Keyboard_International5, (5,9) },
+            { LedId.Keyboard_RightAlt, (5,10) },
+            { LedId.Keyboard_RightGui, (5,11) },
+            { LedId.Keyboard_Application, (5,12) },
+            { LedId.Keyboard_RightCtrl, (5,14) },
+            { LedId.Keyboard_ArrowLeft, (5,15) },
+            { LedId.Keyboard_ArrowDown, (5,16) },
+            { LedId.Keyboard_ArrowRight, (5,17) },
+            { LedId.Keyboard_Num0, (5,18) },
+            { LedId.Keyboard_NumPeriodAndDelete, (5,20) }
+        };
+
+        #endregion
+
         /// <summary>
         /// Contains all the hardware-id mappings for CoolerMaster devices.
         /// </summary>
@@ -702,6 +1493,38 @@ namespace RGB.NET.Devices.CoolerMaster
                     { CoolerMasterPhysicalKeyboardLayout.EU, MasterKeysS_EU }
                   }
                 },
+
+                { CoolerMasterDevicesIndexes.MasterKeys_MK750, new Dictionary<CoolerMasterPhysicalKeyboardLayout, Dictionary<LedId, (int row, int column)>>
+                  {
+                    { CoolerMasterPhysicalKeyboardLayout.US, MasterKeysMK750_US},
+                    { CoolerMasterPhysicalKeyboardLayout.EU, MasterKeysMK750_EU },
+                    { CoolerMasterPhysicalKeyboardLayout.JP, MasterKeysMK750_JP }
+                  }
+                },
+
+                { CoolerMasterDevicesIndexes.CK372, new Dictionary<CoolerMasterPhysicalKeyboardLayout, Dictionary<LedId, (int row, int column)>>
+                  {
+                      { CoolerMasterPhysicalKeyboardLayout.US, CKxxx_US},
+                      { CoolerMasterPhysicalKeyboardLayout.EU, CKxxx_EU },
+                      { CoolerMasterPhysicalKeyboardLayout.JP, CKxxx_JP }
+                  }
+                },
+
+                { CoolerMasterDevicesIndexes.CK550, new Dictionary<CoolerMasterPhysicalKeyboardLayout, Dictionary<LedId, (int row, int column)>>
+                  {
+                      { CoolerMasterPhysicalKeyboardLayout.US, CKxxx_US},
+                      { CoolerMasterPhysicalKeyboardLayout.EU, CKxxx_EU },
+                      { CoolerMasterPhysicalKeyboardLayout.JP, CKxxx_JP }
+                  }
+                },
+
+                { CoolerMasterDevicesIndexes.CK551, new Dictionary<CoolerMasterPhysicalKeyboardLayout, Dictionary<LedId, (int row, int column)>>
+                  {
+                      { CoolerMasterPhysicalKeyboardLayout.US, CKxxx_US},
+                      { CoolerMasterPhysicalKeyboardLayout.EU, CKxxx_EU },
+                      { CoolerMasterPhysicalKeyboardLayout.JP, CKxxx_JP }
+                  }
+                },
             };
 
         #endregion
diff --git a/RGB.NET.Devices.CoolerMaster/Mouse/CoolerMasterMouseLedMappings.cs b/RGB.NET.Devices.CoolerMaster/Mouse/CoolerMasterMouseLedMappings.cs
index d2ce48b..61bee7d 100644
--- a/RGB.NET.Devices.CoolerMaster/Mouse/CoolerMasterMouseLedMappings.cs
+++ b/RGB.NET.Devices.CoolerMaster/Mouse/CoolerMasterMouseLedMappings.cs
@@ -32,6 +32,22 @@ namespace RGB.NET.Devices.CoolerMaster
                     { LedId.Mouse2, (0,1) }
                   }
                 },
+
+                { CoolerMasterDevicesIndexes.MM530, new Dictionary<LedId, (int row, int column)>
+                  {
+                      { LedId.Mouse1, (0,0) },
+                      { LedId.Mouse2, (0,1) },
+                      { LedId.Mouse3, (0,2) }
+                  }
+                },
+
+                { CoolerMasterDevicesIndexes.MM520, new Dictionary<LedId, (int row, int column)>
+                  {
+                      { LedId.Mouse1, (0,0) },
+                      { LedId.Mouse2, (0,1) },
+                      { LedId.Mouse3, (0,2) }
+                  }
+                },
             };
 
         #endregion
diff --git a/RGB.NET.Devices.CoolerMaster/Native/_CoolerMasterColorMatrix.cs b/RGB.NET.Devices.CoolerMaster/Native/_CoolerMasterColorMatrix.cs
index 524c909..c3d1312 100644
--- a/RGB.NET.Devices.CoolerMaster/Native/_CoolerMasterColorMatrix.cs
+++ b/RGB.NET.Devices.CoolerMaster/Native/_CoolerMasterColorMatrix.cs
@@ -9,8 +9,8 @@ namespace RGB.NET.Devices.CoolerMaster.Native
 
         // ReSharper disable MemberCanBePrivate.Global
 
-        internal const int ROWS = 6;
-        internal const int COLUMNS = 22;
+        internal const int ROWS = 7;
+        internal const int COLUMNS = 24;
 
         // ReSharper restore MemberCanBePrivate.Global
 
diff --git a/RGB.NET.Devices.CoolerMaster/Native/_CoolerMasterSDK.cs b/RGB.NET.Devices.CoolerMaster/Native/_CoolerMasterSDK.cs
index 1b08f60..00e89c8 100644
--- a/RGB.NET.Devices.CoolerMaster/Native/_CoolerMasterSDK.cs
+++ b/RGB.NET.Devices.CoolerMaster/Native/_CoolerMasterSDK.cs
@@ -97,26 +97,26 @@ namespace RGB.NET.Devices.CoolerMaster.Native
 
         [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
         [return: MarshalAs(UnmanagedType.I1)]
-        private delegate bool IsDevicePlugPointer();
+        private delegate bool IsDevicePlugPointer(CoolerMasterDevicesIndexes devIndex);
 
         [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
-        private delegate CoolerMasterPhysicalKeyboardLayout GetDeviceLayoutPointer();
+        private delegate CoolerMasterPhysicalKeyboardLayout GetDeviceLayoutPointer(CoolerMasterDevicesIndexes devIndex);
 
         [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
         [return: MarshalAs(UnmanagedType.I1)]
-        private delegate bool EnableLedControlPointer(bool value);
+        private delegate bool EnableLedControlPointer(bool value, CoolerMasterDevicesIndexes devIndex);
 
         [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
         [return: MarshalAs(UnmanagedType.I1)]
-        private delegate bool RefreshLedPointer(bool autoRefresh);
+        private delegate bool RefreshLedPointer(bool autoRefresh, CoolerMasterDevicesIndexes devIndex);
 
         [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
         [return: MarshalAs(UnmanagedType.I1)]
-        private delegate bool SetLedColorPointer(int row, int column, byte r, byte g, byte b);
+        private delegate bool SetLedColorPointer(int row, int column, byte r, byte g, byte b, CoolerMasterDevicesIndexes devIndex);
 
         [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
         [return: MarshalAs(UnmanagedType.I1)]
-        private delegate bool SetAllLedColorPointer(_CoolerMasterColorMatrix colorMatrix);
+        private delegate bool SetAllLedColorPointer(_CoolerMasterColorMatrix colorMatrix, CoolerMasterDevicesIndexes devIndex);
 
         #endregion
 
@@ -130,37 +130,44 @@ namespace RGB.NET.Devices.CoolerMaster.Native
         /// <summary>
         /// CM-SDK: set operating device
         /// </summary>
-        internal static void SetControlDevice(CoolerMasterDevicesIndexes devicesIndexes) => _setControlDevicenPointer(devicesIndexes);
+        internal static void SetControlDevice(CoolerMasterDevicesIndexes devicesIndexes)
+            => _setControlDevicenPointer(devicesIndexes);
 
         /// <summary>
         /// CM-SDK: verify if the deviced is plugged in
         /// </summary>
-        internal static bool IsDevicePlugged() => _isDevicePlugPointer();
+        internal static bool IsDevicePlugged(CoolerMasterDevicesIndexes devIndex = CoolerMasterDevicesIndexes.Default)
+            => _isDevicePlugPointer(devIndex);
 
         /// <summary>
         /// CM-SDK: Obtain current device layout
         /// </summary>
-        internal static CoolerMasterPhysicalKeyboardLayout GetDeviceLayout() => _getDeviceLayoutPointer();
+        internal static CoolerMasterPhysicalKeyboardLayout GetDeviceLayout(CoolerMasterDevicesIndexes devIndex = CoolerMasterDevicesIndexes.Default)
+            => _getDeviceLayoutPointer(devIndex);
 
         /// <summary>
         /// CM-SDK: set control over device’s LED
         /// </summary>
-        internal static bool EnableLedControl(bool value) => _enableLedControlPointer(value);
+        internal static bool EnableLedControl(bool value, CoolerMasterDevicesIndexes devIndex = CoolerMasterDevicesIndexes.Default)
+            => _enableLedControlPointer(value, devIndex);
 
         /// <summary>
         /// CM-SDK: Print out the lights setting from Buffer to LED
         /// </summary>
-        internal static bool RefreshLed(bool autoRefresh) => _refreshLedPointer(autoRefresh);
+        internal static bool RefreshLed(bool autoRefresh, CoolerMasterDevicesIndexes devIndex = CoolerMasterDevicesIndexes.Default)
+            => _refreshLedPointer(autoRefresh, devIndex);
 
         /// <summary>
         /// CM-SDK: Set single Key LED color
         /// </summary>
-        internal static bool SetLedColor(int row, int column, byte r, byte g, byte b) => _setLedColorPointer(row, column, r, g, b);
+        internal static bool SetLedColor(int row, int column, byte r, byte g, byte b, CoolerMasterDevicesIndexes devIndex = CoolerMasterDevicesIndexes.Default)
+            => _setLedColorPointer(row, column, r, g, b, devIndex);
 
         /// <summary>
         /// CM-SDK: Set Keyboard "every LED" color
         /// </summary>
-        internal static bool SetAllLedColor(_CoolerMasterColorMatrix colorMatrix) => _setAllLedColorPointer(colorMatrix);
+        internal static bool SetAllLedColor(_CoolerMasterColorMatrix colorMatrix, CoolerMasterDevicesIndexes devIndex = CoolerMasterDevicesIndexes.Default)
+            => _setAllLedColorPointer(colorMatrix, devIndex);
 
         // ReSharper restore EventExceptionNotDocumented