ZAGG Rugged Book Durable Case, Hinged with Detachable Backlit Keyboard for iPad mini 4 - Black Ultimate Durability: A multi-layered, removable case deflects impact energy to keep your iPad safe no matter where it goes. 4 Multi-Function modes protects your iPad and allows you to quickly separate it from the keyboard for maximum utility. (Keyboard, Case, Video, or Book Modes) Keyboard Mode offers backlit keys and the largest typing area for fast, accurate typing. (Air 2 does not offer multi-color) Magnets activate sleep/wake function to preserve battery Two-Year Battery: A powerful lithium polymer battery powers the Rugged Book for up to two years between charges.