For Microsoft Surface Pro 8Pro X KF17S Tri-color Backlit Touch Bluetooth Keyboard 1. Bluetooth standard interface 2. Effective operating distance: 10 meters 3. Modulation method: GFSK 4. Working voltage: 3.0v-4.2v 5. Working current: 3.0 mA 6. Sleep current: less than 0.3MA 7. Button strength: 50g-70g 8. Charging current: 150-300mA 9. Standby time: about 100 days 10. Charging time: 2-3 hours 11. Lithium battery capacity: 650 mAh 12. Sustainable working hours: no less than 30 hours 13. Lithium battery life: 3 million times 14. Wake-up time: 2-3 seconds 15. Button life: 3 million clicks 16. Operating temperature: -10 to 55 17. Charging port: Type-C interface 18. Tri-color backlight 19. No pairing code Note: This product does not include a leather case.