Fangrui Product Details Three Folding Bluetooth Keyboard, Three System Compatible + With Touch Version Highly Sensitive Touchpad, Double-click And Drag Files, More Comfortable To Use Humanized Folding, Three-fold Design, Slim And Light, Easy To Carry Lock Screen Function, Directly Operate On The Keyboard To Lock The Screen Of Mobile Phones And Tablets, Convenient Keypad Lock Screen Function Helps To Protect Your Privacy And Is Also Conducive To Device Power Saving Light Sound And Comfortable, Scissor Foot Buttons, Uniform Force On The Keys, Natural And Smooth, Prevent Finger Slippage Input Is Not Tired, Office Is More Efficient Description: 1. Bluetooth Type: Bluetooth 3.0 2. Effective Operating Distance: 0m 3. Keyboard Layout: Standard Qwerty 4. Working Voltage: 3.3-4.2v 5. Charging Voltage: Dc 5v 500ma 6. Battery Capacity: 140mah 7. Continuous Working Time: Greater Than40h 8. Bluetooth Solution: American Broadcom 9. Standby Time: 100 Days 10. Charging Time: 2h 11. Number Of Keys: 64 Keys 12. : Greater Than5 Million Times