A12B-A Ultra-thin ABS Detachable Bluetooth Keyboard Tablet Case with Touchpad & Pen Slot & Holder for iPad Pro 12.9 2021 / 2020 / 2018 (Black)

1. Bluetooth 3.0 standard interface 2. Effective operating distance: 10 meters 3. Modulation method: GFSK 4. Working voltage: 3.0-4.2V 5. Working current: less than 2.5mA 6. Standby current: less than 0.3mA 7. Sleep current: less than 40uA 8. Charging current: more than 200mA 9. Standby time: more than 100 days 10. Charging time: 3-4 hours 11. Lithium battery capacity: 200mAh 12. Sustainable working hours: 100 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. Tpye-C charging port