Highlights: Specially designed for surface surface pro 3 surface pro 4 surface pro 5 surface pro 6 surface pro 7. The keyboard button uses the latest stable scissors structure to give you a more convenient and efficient typing experience just like a traditional laptop. High intensity magnetic absorption. The top of the keyboard adopts high intensity magneto absorption technology. Attach or detach to connect your Surface Pro3/Pro4 is both available, just according to your preferences. Wireless Bluetooth performance. Providing high speed connection; When your device power on, just need 4 seconds to connect back automatically without re-connection. The valid connection distance is up to 10M. Responsive Trackpad. With a responsive trackpad, conveniently using like a mouse, navigate and control your tablet precisely, gives you the touch screen experience. No delay and stable connection. Magnetic Absorption Charge. Use the Newest magnetic absorption charge function with no need to worry about the charging cable. Built-in 350mAh rechargeable lithium battery provides about 150 hours of effective usage time, extra long standby time up to 90 days per full charge. Sleep mode function. When keyboard 10 minutes no operation instruction will enter Sleep mode, keyboard lights will turn off, if need to use just press any key keyboard automatically starts after 5 seconds, the power indicator lights up again. Specification: 1. Bluetooth 3.0 standard interface 2. Effective operating distance 10M 3. Modulation GFSK 4. Working Voltage: 3.0 - 4.2V.; Working Current: 0.3 mA; 5. Charging Current: >200mA 6. Charging time: 2-3hours; Lithium battery capacity: 350mAh