Apple iPad 2, New iPad 3 and iPad 4 Aluminum Bluetooth Keyboard Case Cover Stand Compatible with Apple iPad 2 iPad 3 and iPad 4 Keyboard is made out of high quality aluminum alloy . Aluminum enclosure with a black keyboard and trim Built in lithium battery (160mAh) lets you enjoy up to 55 hours of uninterrupted work time. Charging time is only 4-5 hours It's our responsibility to guarantee the quality of products. It's our purpose to provide better service.