2089A Wireless Bluetooth Keyboard Leather Case with Touchpad Features 1. Magnetic adsorption design, easy to use via Bluetooth connection 2. The keyboard has a touchpad and supports a variety of shortcut gestures for easy daily operation 3. Can store the touch pen at the same time (does not support the charging function of the original touch pen) 4. Compatible models: for Microsoft Surface Pro 10 Pro 9 Pro 8 Pro X Specifications 1. Bluetooth standard interface 2. Effective operating distance: 10m 3. Modulation mode: GFSK 4. Working voltage: 3.0-4.2V 5. Working current: less than 8mA (when the touchpad is working) 6. Standby current: less than 0.3mA 7. Sleep current: less than 40uA 8. Charging current: 100mA 9. Standby time: more than 100 days 10. Charging time: 2-3 hours 11. Lithium battery capacity: 350mAh 12. Working time: more than 30H100H (backlight off) 13. Lithium battery life: 3 years 14. Key force: 80+-10g 15. Key life: 5 million clicks 16. Operating temperature: -10 degrees Celsius to +55 degrees Celsius