COMPATIBILITY: It supports Bluetooth 4.0,wireless control more than 10 meters. Automatic identify android system, no need to switch manually. FUNCTIONS: the mini bluetooth remote control can be used for cell phone, tablet, wireless bluetooth game handle, music control, selfie, self-timer, , etc. BUILT-IN LITHIUM BATTERY: It has built-in lithium battery, with mini USB port for charging.Low consumption and long standby. LED LIGHT: Charger power 5v/1A, Red light on when charging; and Red light off when full .Blue light on when Bluetooth paired and mode switched. Please use standard 5V/1A charger and cable to charge it, and use it after full charge MODE KEY: Enter (OK), Return, Mode Switch, ON/OFF, Function key, Joystick, Physical keys have audible feedback Colour:black Material:ABS Size:71 x 71 x 41mm Package Contents: 1 x controller 1 x charging cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.