For Microsoft Surface Pro 9 SF129-A Tree Texture Touchpad Bluetooth Keyboard Leather Tablet Case(Black)

1. Bluetooth standard interface
2. Effective operating distance: 10 meters
3. Modulation method: GFSK
4. Working voltage: 3.7-4.0V
5. Working current: <8MA
6. Standby current: <0.3MA
7. Sleep current: <50UA
8. Charging current: >200mA
9. Standby time: >100 days
10. Charging time: 2-3 hours
11. Lithium battery capacity: 200MA
12. Sustainable working hours: >= 30 hours
13. Lithium battery life: 3 years
14. Button force: 80+/-10g
15. Button life: 5 million clicks
16. Working temperature: -10-55 degrees Celsius
17. Charging port: Type-C interface