The leather case is made of skin-friendly PU material, and the back is made of acrylic anti-bending design The bottom slot adopts the airbag anti-drop design, which can effectively protect your tablet The protective case can be changed into a bracket in seconds and can be rotated in both directions. Support multi-angle adjustable The protective case supports the auto sleep function, which can effectively save power With a pen slot for storage, you are not afraid of losing your pencils Comes with Bluetooth keyboard 3.0, upward compatible with 5.1 Bluetooth devices The Bluetooth keyboard adopts a high-speed chip, which can connect to Bluetooth devices in seconds It is charged with the Micro USB cable, and it can be freely carried and used when fully charged Specifications Battery material lithium-polymer battery Bluetooth 3.0 upward compatible with 3.04.05.1 Bluetooth devices Effective distance 10 meters Standby time 100 days Continuous working time not less than 100 hours Charging time 2-3 hours Lithium battery capacity 280mAh Lithium battery life 2 years Button life 3 million clicks Modulation method GFSK Working voltage 3.0-4.2V Working current 14-17mA Standby current lt0.3mA Sleep current lt40uA Charging current 100mA normal Charging method Micro USB cable charging