X3S 10 inch Universal Tablet Round Keycap Wireless Bluetooth Keyboard, Backlight Version 1. Bluetooth 3.0 standard interface 2. Effective operating distance: 10 meters 3. Modulation method: 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: more than 200mA 9. Standby time: more than 100 days 10. Charging time: 3-4 hours 11. Lithium battery capacity: 200mAh 12. Sustainable working hours: more than 100 hours 13. Lithium battery life: 3 years 14. Button force: 80and-10g 15. Button life: 5 million clicks 16. Working temperature: -10 to 55 degrees Celsius 17. Material: ABS plastic 18. Can be connected to digital products such as tablets and laptops 19. Freely switchable 7-color backlight 20. Size: 248x150x6mm 21. Weight: 205g Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store