Integrated Bluetooth Keyboard Leather Case with Backlight & Touchpad & Holder, For iPad Air 5 / Air 4 10.9, For iPad Pro 11 2021 / 2020 / 20181. Working voltage: 3. 0 4. 2V 2. Working current: about 6 10mA 3. Working hours: about 70 hours 4. Standby time: about 150 days 5. Connection distance: about 10 meters 6. Battery capacity: about 180mAh 7. Charging current: about 200mA 8. Charging time: about 2 3 hours 9. Charging interface: Type C interface 10. Number of keys: 78 keys 11. Bluetooth version: 5. 0 12. Keyboard size: 246. 2x169x6. 5mm Specification: General Compatible with Apple: iPad