COMPATIBILITY: Supports Bluetooth 4.0 for wireless control up to 10 meters. Automatically identifies Android system; no manual switching required. FUNCTIONS: This mini Bluetooth remote control can be used with cell phones, tablets, wireless Bluetooth game controllers, music players, and for taking selfies or using self-timer functions. BUILT-IN LITHIUM BATTERY: Equipped with a built-in lithium battery and mini USB port for charging. Low power consumption with extended standby time. LED INDICATORS: Red light turns on during charging and turns off when fully charged. Blue light turns on when Bluetooth is paired and mode is switched. Use a standard 5V/1A charger and cable for charging. Allow full charge before use. CONTROL KEYS: Includes Enter (OK), Return, Mode Switch, ON/OFF, Function key, Joystick. Physical keys provide audible feedback. Color: Black Material: ABS Size: 71 x 71 x 41mm Package Contents: 1 x Controller, 1 x Charging Cable Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.