YAM29-A Ultra-thin Detachable Round Keycap Bluetooth Keyboard Leather Tablet Case with Touchpad 1. Bluetooth 3.0 standard interface 2. Effective operating distance: 10 meters 3. Modulation mode: 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: greater than 200mA 9. Standby time: more than 100 days 10. Charging time: 3-4 hours 11. Lithium battery capacity: 150mAh 12. Sustainable working time: 100 hours 13. Lithium battery life: 3 years 14. Key force: 80-+10g 15. Key life: 5 million clicks 16. Working temperature: -10 degrees Celsius to 55 degrees Celsius 17. Interface: Type-C interface 18. Keyboard with touchpad