diff --git a/lib/logitech_receiver/special_keys.py b/lib/logitech_receiver/special_keys.py
index cbc9f79f..6eeba26c 100644
--- a/lib/logitech_receiver/special_keys.py
+++ b/lib/logitech_receiver/special_keys.py
@@ -108,17 +108,17 @@ CONTROL = _NamedInts(
 	LEFT_CLICK=0x0050,
 	RIGHT_CLICK=0x0051,
 	Middle_Button=0x0052,		# MIDDLE_BUTTON
-	Back_Button=0x0053,		# BACK_AS_BUTTON_4
+	Back_Button=0x0053,		# from M510v2 was BACK_AS_BUTTON_4
     	Back=0x0054,			# BACK_AS_HID
 	BACK_AS_ALT_WIN_ARROW=0x0055,
-	Forward_Button=0x0056,		# FORWARD_AS_BUTTON_5
+	Forward_Button=0x0056,		# from M510v2 was FORWARD_AS_BUTTON_5
 	FORWARD_AS_HID=0x0057,
 	FORWARD_AS_ALT_WIN_ARROW=0x0058,
 	BUTTON_6=0x0059,
 	LEFT_SCROLL_AS_BUTTON_7=0x005A,
-	Left_Tilt=0x005B,		# LEFT_SCROLL_AS_AC_PAN
+	Left_Tilt=0x005B,		# from M510v2 was LEFT_SCROLL_AS_AC_PAN
 	RIGHT_SCROLL_AS_BUTTON_8=0x005C,
-	Right_Tilt=0x005D,		# RIGHT_SCROLL_AS_AC_PAN
+	Right_Tilt=0x005D,		# from M510v2 was RIGHT_SCROLL_AS_AC_PAN
 	BUTTON_9=0x005E,
 	BUTTON_10=0x005F,
 	BUTTON_11=0x0060,
@@ -191,8 +191,22 @@ CONTROL = _NamedInts(
 	ZOOMOUT=0x00AB,
 	BACK_HSCROLL=0x00AC,
 	SHOW_DESKTOP_HPP=0x00AE,
+    	Screen_Capture=0x00BF,		# from Craft Keyboard
 	Thumb_Button=0x00C3,		# from MX Master
     	Top_Button=0x00C4,		# from MX Master
+	Brightness_Down=0x00C7,		# from Craft Keyboard
+	Brightness_Up=0x00C8,		# from Craft Keyboard
+	Mission_Control=0x00E0,		# from Craft Keyboard
+	Launchpad=0x00E1,		# from Craft Keyboard
+	Backlight_Down=0x00E2,		# from Craft Keyboard
+	Backlight_Up=0x00E3,		# from Craft Keyboard
+	Previous_Fn=0x00E4,		# from Craft Keyboard
+	Play__Pause_Fn=0x00E5,		# from Craft Keyboard
+	Next_Fn=0x00E6,			# from Craft Keyboard
+	Mute_Fn=0x00E7,			# from Craft Keyboard
+	Volume_Down_Fn=0x00E8,		# from Craft Keyboard
+	Volume_Up_Fn=0x00E9,		# from Craft Keyboard
+	Look_Up=0x00EA,			# from Craft Keyboard
 )
 CONTROL._fallback = lambda x: 'unknown:%04X' % x
 
@@ -260,13 +274,13 @@ TASK = _NamedInts(
 	ZoomBtnResetSet=0x0037,
 	LeftClick=0x0038,
 	RightClick=0x0039,
-	Mouse_Middle_Button=0x003A,	# MiddleMouseButton
+	Mouse_Middle_Button=0x003A,	# from M510v2 was MiddleMouseButton
 	Back=0x003B,
-	Mouse_Back_Button=0x003C,		# BackEx
+	Mouse_Back_Button=0x003C,	# from M510v2 was BackEx
 	BrowserForward=0x003D,
-	Mouse_Forward_Button=0x003E,	# BrowserForwardEx
-	Mouse_Scroll_Left_Button_=0x003F,	# HorzScrollLeftSet
-	Mouse_Scroll_Right_Button=0x0040,	# HorzScrollRightSet
+	Mouse_Forward_Button=0x003E,	# from M510v2 was BrowserForwardEx
+	Mouse_Scroll_Left_Button_=0x003F,	# from M510v2 was HorzScrollLeftSet
+	Mouse_Scroll_Right_Button=0x0040,	# from M510v2 was HorzScrollRightSet
 	QuickSwitch=0x0041,
 	BatteryStatus=0x0042,
 	Show_Desktop=0x0043,		# ShowDesktop
@@ -338,8 +352,15 @@ TASK = _NamedInts(
 	ShowUI=0x0092,
 	Switch_Screen=0x0093,		# from K400
 	Maximize_Window=0x0095,		# from K400
-	Mouse_Thumb_Button=0x00A9,	# from MX Master
 	Toggle_Free_Spin=0x009D,	# from MX Master
+	Mouse_Thumb_Button=0x00A9,	# from MX Master
+	Brightness_Down=0x00A3,		# from Craft Keyboard
+	Brightness_Up=0x00A4,		# from Craft Keyboard
+	Switch_Workspace=0x00BF,	# from Craft Keyboard
+	Launchpad=0x00C0,		# from Craft Keyboard
+	Backlight_Down=0x00C1,		# from Craft Keyboard
+	Backlight_Up=0x00C2,		# from Craft Keyboard
+	Context_Menu=0x00C3,		# from Craft Keyboard
 )
 TASK._fallback = lambda x: 'unknown:%04X' % x
 # hidpp 4.5 info from https://lekensteyn.nl/files/logitech/x1b04_specialkeysmsebuttons.html