C12B Detachable Pen Slot Bluetooth Keyboard Leather Tablet Case For iPad Pro 12.9 inch 2021/2020/2018(Black)

1. Bluetooth 3.0 standard interface2. Effective operating distance: 10 meters3. Modulation method: GFSK4. Working voltage: 3.0-4.2V5. Working current: 2.5mA6. Standby current: 0.3mA7. Sleep current: 40uA8. Charging current: 200mA9. Standby time: about 100 days10. Charging time: 3-4 hours11. Lithium battery capacity: 200mah12. Sustainable working hours: 100 hours13. Lithium battery life: 3 years14. Button force: 80 +/-10g15. Button life: 5 million clicks16. Operating temperature: -10+/-55 degrees Celsius17. Charging interface: Tpye-C18. Weight: 891g19. Size: 29.4×20.5x2cm