Introduction: RK Royal Kludge RK71 is a LED blue backlight Mechanical Keyboard with 71 keys.It supports Bluetooth and Wired Dual Mode Connections and compatible with Windows/MacOS and other systems.It has various application designs,such as All Keys Without Conflict,RGB Sidelight,FN Multi-function Key and 3 Groups Macro Keys. Specifications: Size:13x4x1.6inches Layout:71Keys Connection:USB Type-C Wired, Bluetooth Wireless Backlight/Sidelight:LED/RGB Material:ABS Cable:67inches Type-c USB Cable Switch:Blue or Brown or Red Keyboard Colors:Black or White Modes:Bluetooth 3.0 and USB Voltage:5V Systems Support:Windows XP/VISTA/7/8/10, IOS, Macos, Linux, Android Method of Use Adjust the Backlight FNEnd=Adjust Backlight colors FNHome=Switch Backlight effects FNIns=Switch Sidelight effects FNArrow keys=Adjust brightness and speed Macro Keys Press FNTab to turn on/off Macro Key.Long press FNZ/X/C for 3 seconds can set Key Macro Recording and short press can turn on/off the corresponding Key Macro Recording Shortcut Keys FN(F1-F12)=Achieve the functions such as: Previous track,Play/Pause,Mute and so on Connect Bluetooth 1.Please press FNP to switch to BT mode 2.Select a group of BT modes to be connected through FNQ/W/E/R/T 3.Press FNQ for a long time.At this time,the Q key will flash continuously and quickly,and the keyboard has entered the pairing mode 4.Open the computer/mobile BT,search and connect the device 5.Connect successfully,P key stops flashing, complete Package Content: 1xRK71 Mechanical Keyboard 1xRemovable Type-C cable 2xMagnetic Keyboard Feet 1xKeycap Puller 1xUser manual.