Switch wired bluetooth mode Wired mode Switch on the back of the keyboard needs to be OFF with cable connected, Bluetooth mode Switch ON with the cable disconnected Bluetooth matching mode Long press FN and Q W E to activate Bluetooth pairing mode, Q W E will be flickering when the keyboard is able to be paired, backlit will stop flickering when the pairing is complete Switch arrow key function FN and Enter Switch secondary 6 functional key FN and Left Ctrl Way to type a FN and Right SHIFT and or press Left SHIFT and directly under arrow keys function disabled Specifications Dimension about 292 102 39mm Net Weight about 0.5kg Key Switch Red Switch Operating Force 50g 60g Key Numbers 61 Keys Key Life and gt,50 million times Keycap Type ABS Double Shot Keycaps Operating System Windows XP Win2000 Win7 Win8 Win10 Mac IOS Android Built in High capacity Battery Package Included 1 x RK61 mechanical keyboard 1 x Type C cable 1 x User manual Note Spacebar backlit will flash 3 times while charging, 5 times shows its fully charged.