... : Aluminum alloy•1. be suitable for all Apple series of cases of products, such as for the iPhone, iPad & tablet PCs ... practical, unique design, beautiful and convenient appearance, light weight, built-in lithium battery, mini USB charging port, ready to charge for ... hours4. Audio output power: 4Ω3W * 2 super slim 3 in 1 (Wireless Bluetooth Keyboard+Aluminum Case+iPad2 Stand) Aluminum bluetooth ...