1. Bluetooth version: Bluetooth 3.02. Effective operating range: within 10 meters3. Working voltage: 3.0-4.2V4. Working current: less than 6mA5. Lithium battery capacity: 500mAh6. Working hours: Backlight mode: 14h, Non-backlight mode: 100h7. Charging time: less than or equal to 2.5h8. Detachable keyboard design with adjustable stand9. All-metal camera sliding cover design to avoid scratches and effective collisions10. 110-180 degree stepless adjustment bracket, strong mechanical hinge, stable support without shaking11. Thickened PC backplane greatly improves anti-bending ability12. Highly elastic TPU soft frame, shock-resistant and anti-fall, preventing damage to the device when falling13. Soft light buttons, evenly distributed, comfortable and non-glaring for night useSpecification: General Compatible with Samsung:  Galaxy Tab S9+ Package Weight One Package Weight 1.18kgs / 2.59lb One Package Size 32cm * 23cm * 3.5cm / 12.6inch * 9.06inch * 1.38inch Qty per Carton 20 Carton Weight 22.00kgs / 48.50lb Carton