Keyboard is made out of high quality aluminum. Built in lithium battery lets you enjoy up to 55 hours of uninterrupted work time. Charging time is only 4-5 hours. iPad goes into the keyboard when not being used and is a great case and keyboard for the iPad. USB cable included for charging. Works with all versions of iPad2, iPad3 and iPad 4. Keyboard will connect to any Bluetooth device but it can only be used as a case and stand for iPad2, iPad3, and iPad4.