Fangrui Product Details 1. Q3 2.4g Mini Wireless Office Digital Keyboard Cash Register Financial Accounting Password Keypad 2. Material: Abs 3. Number Of Keys: 20 Keys 4. Key Technology: Palace Column Structure 5. Connection Method: Usb Wireless Connection 6. Interface: Usb 7. Key Resilience: About 65gf 8. Power Supply: 1 Aaa Battery (not Included) 9. Operating Ambient Temperature: -40-55 Degrees Centigrade 10. Button Operating Pressure: 50-350 Gcm 11. Weight: About 147 G 12. Dimensions: About 13.5 X 8.7 X 3.5 Cm 13. Packing List: Product, Receiver 14. Features: 15. Digital Keypad, Slim And Portable, Multimedia Keys With Waterproof Function 16. Plug And Play Device, No Driver Needed, Usb Port Required 17. Support Ergonomic Design, Light And Comfortable Hand Feeling, Fast Response Time, Improve Work Efficiency 18. Full-size Keys Increase Speed And Accuracy By Making It Easier To Locate And Press The Number Youre Looking For 19. Digital Keyboard Supports Numlock, Tab, Delete And Other Keys, With Shortcut Keys, You Can Directly Open The Computer Calculator 20. Anti-slip Silicone Feet, Stable And Easy To Use, Reduce The Chance Of Pressing The Wrong Button 21. Widely Compatible With Pcs And Desktops With Windows And Ios Operating Systems