... unique design, beautiful and convenient appearance, light weight, built-in lithium battery, mini USB charging port, ready to charge for ... PC & ipad/ipad 2, movable, flexible, hands free, aluminum mount holder Working parameter 1.The battery nominal capacity: 3.7V/600MAH2 ... : MAX: 500MA3. Charging time :4-5 hours4. Audio output power: 4Ω3W * 2 super slim 3 in 1 (Wireless Bluetooth Keyboard+Aluminum Case ...