Plug-and-Play Convenience: This wireless numeric pad requires no drivers, just a single battery and a USB port. Ergonomic Design for Comfort: The numeric keypad features soft-touch keys that provide a comfortable typing angle, reducing wrist pressure. With minimal noise, it's perfect for quiet environments and extensive numerical input. Precision and Stability: Each key is clearly marked and raised for precise input. A stable rubber base ensures the keypad stays firmly in place during use, enhancing your efficiency and preventing slippage. Broad Compatibility: Compatible with a wide range of operating systems,this USB wireless numeric keypad seamlessly integrates with both laptops and desktops. Portable and Lightweight: This sleek numeric keypad is your perfect travel companion for business trips or daily use, ensuring productivity on the go. Hign-concerned Chemical:none Switches Hot swap:no Backlight Type:No backlight Interface Type:USB Type:2.4Ghz Wireless The product appearance and printed words may vary depending on the batch, but this does not affect use. Colour:Blue Mixed Color Material:ABS Package Contents: 1 * keyboard 1 * receiver 1 * battery 1 * Chinese and English instruction manual 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.