Surface Pro keyboard enhances the fixed connection with Surface Pro which will be a high-performance laptop One of the most portative mechanical keyboard, Surface Pro keyboard with the speed of the notebook computer keyboard and function, easy to use it It has a key of QWERTY, full line F1-F12. Windows shortcuts and media control key can help you easily navigate Super rich touch panel allows you to easily control the cursor through the fingers Can have the experience of tablets when the keyboard cover folds back Specifications Effective operating distance 10 meters Modulation method GFSK Working voltage 3.0-4.2V Working current less than 2.5mA Standby current less than 0.3mA Sleep current less than 40uA Charging current greater than 200mA Standby time more than 100 days Charging time 2-3 hours Lithium battery capacity 350mAh Sustainable working hours 35-100 hours Lithium battery life 3 years Button force 80 plusmn10g Button life 5 million clicks Working temperature -10 to 55