ZAGG Slim Book Ultrathin Cover and Bluetooth Keyboard for Microsoft Surface Pro 3 / Surface Pro 4 Connects via Bluetooth so you can place your Slim Cover wherever is most convenient for you to type - no wires or magnetic connection needed. Backlit, island-style keys click and respond just like a traditional keyboard so you can work faster and more accurately - even in low-light situations. An integrated trackpad helps you navigate smoothly through all your apps and programs. Magnets secure your keyboard to your Surface and also allow you to angle your keyboard for a more ergonomic feel. A full set of function and media control keys ensure you can quickly and easily manage your work and play. Type for up to three months with Regular use on the Slim Cover's battery that doesn't drain your tablet's power like other magnetically connected keyboards. Multi-pairing capability allows you to sync your Slim Cover with up to two Windows 7 or newer devices and easily toggle between them