Features: Two 7 # batteries、 super long standby use The keyboard when not in use into standby sleep mode automatically BK3001G、 small size and save working space、 feel is unusual. Item type:Bluetooth Keyboard Color:Black、White Bluetooth V3.0 standard interface. operating distance: 10 m RF output power:<4DBM working voltage: 3.0 V current work: 4mA System compatibility: MAC Package included: 1x Bluetooth Keyboard