Fangrui Product Details 1. K3 19 Key 2.4g Wireless Mini Digital Keyboard Suspension Machinery Keypad 2. Material: Abs Plastic 3. Key Number: 19 Keys 4. Key Technology: Crater Architecture 5. Connection: 2.4g Usb Wireless Connection 6. Power Supply: 1 Aaa (not Included) 7. Weight: About 97 G 8. Size: About 13.3 X 9.7 X 2.7 Cm 9. Features: 10. Wireless Connection, Plug And Play, Long-distance Transmission 11. 2.4g Wireless Transmission, Stable Data Without Constraints, Fast Response Time 12. Crater Button Design, Conforming To The Shape Of The Finger, Comfortable Input Feel, Quick Rebound 13. Anti-skid Silicone Feet, Stable But Not Floating, Intimate And Easy To Use, Reduce The Chance Of Pressing The Wrong One 14. Splash-proof Design, When Removing The Key-caps, No Water Can Enter 15. Compact And Portable, Thin And Lightweight, Easy To Store, Space-saving, Is A Good Companion For Business Trips 16. Three System Compatibility, The Keypad Digital Input Independent Operation, No Conflict With The Computers Own Keyboard, Compatible With A Variety Of Operating Systems, Without The Need To Install The Driver