Rii K11 Wireless Bluetooth Keyboard Case with Rechargable Li-ion Battery for Microsoft Surface Pro 3 / 4 1.Surface pro 3/4 will be a high performance for Tablet,Surface pro 3/4 keyboard Type cover enhance the fixed connection with Surface pro 3/4 2.The function QWERTY keys,media control key,and Touchpad,It has a key of QWERTY, Multi-function keys (F1-F12),Windows shortcut and media control key 3.The keyboard cover(Built-in rechargeable battery), Surface pro 3/4 keyboard cover fold back like a magazine have a great protection for tablet,when keyboard cover fold back,surface pro 3/4 Key is disabled to do unexpected input,when you closed it 4.The keyboard will enter into sleep mode when it is inactive about 15 minutes,and the keyboard(power) indicator or light will turn off,just press any key withtin 3 seconds to active it. 5.The keyboard Enhanced with magnetic stability to keep the keyboard steady