1. Bluetooth 3.0 standard interface2. Effective operating distance: 10 meters3. Modulation method: GFSK4. Working voltage: 3.0-4.2V5. Working current: 2.5mA6. Standby current: 0.3mA7. Sleep current: 40uA8. Charging current: 200mA9. Standby time: about 100 days10. Charging time: 3-4 hours11. Lithium battery capacity: 200mah12. Sustainable working hours: 100 hours13. Lithium battery life: 3 years14. Button force: 80+/-10g15. Button life: 5 million clicks16. Working temperature: -10-55 degrees Celsius17. Three-color backlit keyboard18. Keyboard with trackpad19. Not just a protective case, built-in bluetooth keyboard, more powerful20. Bluetooth chip, fast speed, low power consumption, stable21. Precise cut for easy access to all buttons and ports, giving you smooth operation22. Stand and pen tray function, easy to use23. Tablets are not included24. Size: 25.3×20.5×2.2cm25. Weight: 609gNote: The touchpad can be used for ios system 13.4 and above