1089D for Microsoft Surface Pro 3/4/5/6/7 Colorful Backlight Laptop Magnetic Adsorption Bluetooth Wireless Keyboard with Touchpad ?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 ?With colorful backlight,which provides you with excellent visual effect 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: 550mAh ?Sustainable working hours: about 120 hours ?Lithium battery life: 3 years ?Button force: 80 ?��10g ?Button life: 5 million clicks ?Working temperature: -10 to +55?? Package included: ?1 x Keyboard ?1 x Charging Cable ?1 x English User Manual