X-11BS Skin Plain Texture Detachable Bluetooth Keyboard Tablet Case for iPad Pro 11 inch 2020 / 2018, with Pen Slot & Backlight (Black)

1. Bluetooth 3.0 standard interface 2. Effective operating distance: 10 meters 3. Modulation method: GFSK 4. Working voltage: 3.1-4.2V 5. Working current: <=3.0mA 6. Standby current: <0.3mA 7. Sleep current: <=0.1mA 8. Charging current: <=200mA 9. Standby time: >=95 days 10. Charging time: <=2 hours 11. Lithium battery capacity: 400mAh 12. Sustainable working time: >=76 hours 13. Lithium battery life: 3 years 14. Button force: 50-80g 15. Key life: 3 million clicks 16. Working temperature: -10-+ 55 Degrees Celsius 17. Product material: skin-like plain weave + TPU pen slot shell