HK006D Square Keys Detachable Bluetooth Solid Color Keyboard Leather Tablet Case with Colorful Backlight & Holder for iPad mini 6(Black) 1. Smooth cloth pattern PU material, TPU soft shell all-inclusive protective cover 2. Built-in pen slot, support charging function, detachable Bluetooth keyboard, plastic square scissors foot buttons 3. Bluetooth 3.0 standard interface 4. Effective operating distance: 10 meters 5. Modulation method: GFSK 6. Working voltage: 3.0-4.2V 7. Working current: less than 2.5mA 8. Standby current: less than 0.3mA 9. Sleep current: less than 40uA 10. Charging current: 100mA 11. Standby time: more than 100 days 12. Charging time: 2-3 hours 13. Lithium battery capacity: 400mAh 14. Sustainable working hours: more than 100 hours 15. Lithium battery life: 3 years 16. Button force: 80 +-10g 17. Button life: 5 million clicks 18. Working temperature: -10 ~ +55 degrees Celsius 19. Product size: 20.4*16.0*2.4cm 20. Product weight: 390g