... Aluminum alloy•1. be suitable for all Apple series of cases of products, such as for the iPhone, iPad & tablet PCs, IPAd player device.•2 ... , built-in lithium battery, mini USB charging port, ready to charge for the host machine.•3.Product size: 246 ... hours4. Audio output power: 4Ω3W * 2 super slim 3 in 1 (Wireless Bluetooth Keyboard+Aluminum Case+iPad2 Stand) Aluminum bluetooth keyboard for iPad 2/3