A11B Lambskin Texture Ultra-thin Bluetooth Keyboard Leather Case with Pen Holder For iPad Air 5 2022 Air 4 2020 10.9 & Pro 11 inch 2021 2020 2018(Black) Features: 1. Not just a protective case, built-in bluetooth keyboard, more powerful 2. The keyboard and leather case can be separated 3. Bluetooth chip, fast speed, low power consumption, stable 4. Precise cut for easy access to all buttons and ports, giving you smooth operation 5. Bracket and pen tray function, easy to use 6. Easy to insert and remove 7. Tablets are not included Product Specifications: 1. Bluetooth 3.0 standard interface 2. Effective distance: 10m 3. Modulation method: 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 40 microamps 8. Charging current: greater than 200mA 9. Standby time: more than 100 days 10. Charging time: 3-4 hours 11. Lithium battery capacity: 200mAh 12. Sustainable working hours: 100 hours 13. Lithium battery life: 3 years 14. Button force: 80+-10g 15. Button life: 5 million clicks 16. Working temperature: -10-55 degrees Celsius 17. Weight: 700g 18. Product size: 25.4x20x2.4cm Features: 1. Not just a protective case, built-in bluetooth keyboard, more powerful 2. The keyboard and leather case can be separated 3. Bluetooth chip, fast speed, low power consumption, stable 4. Precise cut for easy access to all buttons and ports, giving you smooth operation 5. Bracket and pen tray function, easy to use 6. Easy to insert and remove 7. Tablets are not included Product Specifications: 1. Bluetooth 3.0 standard interface 2. Effective distance: 10m 3. Modulation method: 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 40 microamps 8. Charging current: greater than 200mA 9. Standby time: more than 100 days 10. Charging time: 3-4 hours 11. Lithium battery capacity: 200mAh 12. Sustainable working hours: 100 hours 13. Lith