Amazon description: ZAGG Slim Book Wireless Bluetooth Keyboard The ZAGG Slim Book iPad keyboard and detachable case is the ultra-slim solution to your mobile typing needs. Its unique hinge secures your tablet at virtually any viewing angle and allows for a convenient keyboard, video, and book mode, it also folds flat for a protective case mode. The Slim Book is powered by one of the industry’s most powerful batteries that keeps you typing for up to two years between charges*. Long Lasting The Slim Book’s powerful, rechargeable battery provides up to two years of typing between charges*. Two years! Think of all the things you can get done without stopping to charge. *Based on regular use of one hour per day. Using the backlit feature will impact battery life and will require more frequent charging.