适用于三星 Galaxy Tab A9 的带键盘保护套，带笔架，多角度支架保护套，可拆卸无线键盘
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: -20°C to 55°C
Storage temperature: -40°C to 70°C
Working distance: 10 meters
Modulation system: GFSK
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