PST-X620 Touchpad Backlight Bluetooth Keyboard Leather Tablet Case 1. Bluetooth standard interface 2. Effective operating distance: 10m 3. Modulation method: GFSK 4. Working voltage: 3.0-4.2V 5. Working current: < 8mA 6. Standby current: < 0.3mA 7. Sleep current: < 40uA 8. Charging current: about 200mA 9. Standby time: about 100 days 10. Charging time: 3-4h 11. Lithium battery capacity: 200mAh 12. Sustainable working hours: >50 hours (up to 100 hours with lights off) 13. Lithium battery life: 3 years 14. Button force: 80and-10g 15. Button life: 5 million clicks 16. Operating temperature: -10 to 55 degrees Celsius 17. Not just a protective case, built-in bluetooth keyboard, more powerful 18. Bluetooth chip, fast speed, low power consumption, stable 19. Stand function, easy to use 20. With touchpad and colorful backlight 21. The tablets PC is not included 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.