OP17-AS Ultra-thin Detachable Backlight Bluetooth Keyboard Leather Tablet Case with Touchpad 1. Multi-angle stable support to meet different angle requirements. 2. Detachable keyboard, more convenient to use. 3. Fully wrapped protection on all sides to prevent the four corners of the device from being knocked, peeled, and worn. 4. Low-noise buttons do not disturb others. 5. Bluetooth chip, stable connection, fast speed, and low power consumption. 6. Keyboard with three-color backlight Parameters: 1. Bluetooth 3.0 standard interface 2. Effective operating distance: 10 meters 3. Modulation mode: 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: greater than 200mA 9. Standby time: more than 100 days 10. Charging time: 3-4 hours 11. Lithium battery capacity: 450mAh 12. Sustainable working time: 100 hours 13. Lithium battery life: 3 years 14. Key force: 80+-10g 15. Key life: 5 million clicks 16. Working temperature: -10 -﹢55 degrees 17. Product size: 26.6x19.3x2cm 18. Weight: 660g 19. Type-C charging port