For Microsoft Surface Pro 9 SF129 Tree Texture 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: 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