Introduction: This is a RGB backlight mechanical keyboard with 61 keys.It supports Wireless/Wired Dual Mode Connections to the device and Compatible with Windows/MacOS/Android.It has various application designs,such as All Keys Without Conflict,brilliant color Backlit and control of hardware Backlit Specifications: Size:11.4x3.9x1.7 inches Layout:61 Keys Backlight:RGB Material:ABS Switch:Blue or Brown or Red Keyboard Colors:Black or White Modes:Bluetooth 3.0 and Type-c USB Voltage:5V Systems Support:Windows XP/VISTA/7/8/10,IOS,Macos,Linux,Android Method of Use Combination Keys function Press FN+Left Ctrl to switch to the second function of Combination Keys(except Arrow Keys).Press FN+Ctrl an,to restore the 9 keys main function Y/U/I/H/J/K/N/M/ ,but the other Combination Keys still in the second function.Press FN+Ctrl third times,all the Combination Keys main function recovery.You can also lock/unlock Arrow Keys at any time by pressing FN+Enter Use the Shortcut Keys FN+A/S=Switch Win/Mac FN+(F1-F12)=Achieve functions such as: Previous track,Mute and so on(Only for MacOs) Adjust the Backlight FN+(. )=Adjust Backlight colors FN+( )=Switch Backlight effects FN+([{), (}]), (;:), (' )=Adjust brightness and speed Connect Bluetooth 1.Open the back switch of Keyboard to ''on'' 2.Select a group of BT modes to be connected through FN+Q/W/E 3.Press FN+Q for a long time.At this time,the Q key will flash,and the keyboard has entered the pairing mode 4.Open the computer/mobile BT,search and connect the device 5.Connect successfully,Q key stops flashing Package Content: 1xRK61 Mechanical Keyboard 1xType-C cable 1xKeycap Puller 1xUser Manual.