Magnetic removable keyboard Converts from to stand Stylish PU leather covering Front & Rear-facing camera holes Built-in Lithium polymer battery capacity: 200mah Voltage: 3.7V Power charge connector Input: Micro USB charge 5V Standby Time: >100 days Charging Time: 3-4 hours Uninterrupted Working Time: 100 hours Operating Temperature: -40C-70C Working distance: 10 meters Modulation System: GFSK