switch wired/bluetooth mode (updated version) wired mode: switch on the back of the keyboard needs to be off with cable connected; bluetooth mode: switch on with the cable disconnected (old version) click fn+tab to change into wired or bluetooth mode; bluetooth matching mode (updated version) long-press fn + 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 (old version) long-press fn + p activate bluetooth pairing mode... switch arrow key function fn + enter (updated version) fn + right shift (old version) switch secondary 6 functional key fn + left ctrl (updated/old version) way to type a "?" fn + right shift + /(?) or press left shift + /(?) directly under arrow keys function disabled specifications: dimension: about 292*102*39mm net weight: about 0.5kg key switch: brown switch operating force: 50g-60g key numbers: 61 keys key life: >50 million times operating current: 150ma operating voltage: 5v keycaps type: abs double shot keycaps operating system: windows xp/win2000/win7/win8/win10/mac/ios/android built-in 1450mah lithium battery package included: 1 x rk61 mechanical keyboard 1 x removable type-c cable (micro usb old version) 1 x user manual note: spacebar will have a red led light on while charging, red lights out when fully charged. (old version) spacebar backlit will flash 3 times while charging, 5 times shows it's fully charged. (updated version)dual modes with reliable connection: what makes the keystroke registration instantly is the advanced built-in chip, extremely low latency in the absence of signal interference. easily 3 different devices switchable with fn + q/w/e in wireless mode will hype you up and maximize your productivity.