Description: 1. Number Of Keys: 19 (Keys) 2. Waterproof Function: Support Waterproof 3. Material: ABS 4. Applicable Models: 5. Button Technology: X Architecture 6. Product Size: 13.5 x 8.5 x 3.4cm 7. Backlight Function: No Backlight Support 8. Type: Numeric Keypad 9. Color: Black Power supply mode: 1 AAA battery (not included) Specification: Wired Package Contents: 1 x Connection Cable 1 x Numeric Keypad Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 4. Comfortable Feel, Zero Pressure, Strong Compatibility 2. Floating Keys, Mechanical Feel Features: 1. Mechanical Feel Digital Keyboard, Waterproof Splash Design, Higher Than The Design Of The Key , Effectively Prevent Accidental Water Ingress Do Not Have To Worry About Tea Into The Keyboard Failure 5. When Removing The Keycaps, Do Not Let Water In. 3. With Backspace Key, Driver-Free, Easy To Carry, Plug And Play