Specifications
Built in Lithium polymer battery capacity: 350mah
Voltage: 3.7v
Input: Micro USB charge cable: 5v
Standby time: approx. 30 days.
Continual working time: 60-90H
Charging time: 2.5h-4.5h
Working distance: 10 meters.
size : 7inch  20*15cm
9 inch  23.5*13.5cm
10 inch 24.5*15cm
Note：If you need to specify the color of the keyboard holster, you can send me an email.