SF109 Tree Texture Bluetooth Keyboard Leather Case For Microsoft Surface Pro 4 / 5 / 6 / 7(Black + Black)

Features:1. Not only a protective case, built-in Bluetooth keyboard, more powerful2. The keyboard and leather case can be separated design3. Bluetooth chip, fast speed, low power consumption, stable4. Precise cutting, easy access to all buttons and ports, providing you with smooth operation5. Support function, easy to use6. Easy to insert and remove7. Tablets are not includedSpecifications:1. Bluetooth standard interface2. Effective operating distance: 10 meters3. Modulation method: GFSK4. Working voltage: 3.7-4.0V5. Working current: less than 8mA6. Standby current: less than 0.3mA7. Sleep current: less than 50 microampere8. Charging current: more than 200mA9. Standby time: more than 100 days10. Charging time: 2-3 hours11. Lithium battery capacity: 200mAh12. Sustainable working hours: not less than 30 hours13. Lithium battery life: 3 years14. Button force: 80+/-10g15. Button life: 5 million clicks16. Working temperature: -10-55 degrees Celsius17. Charging port: Type-C18. Weight: 835g19. Product size: 29.8×21.4×2.2cmSpecification: General