Feature:1. Stable Connection: 2.4Ghz wireless technology, plug and play, no device driver, stable signal transmission, no delay digital keypad2. Compatibility: Compatible with for Android Tablet numeric keypad, for Linux, for Chromebook for Windows XP, for Windows Vista, for Windows 7, for Windows 8, for Windows 10 series3. Professional Design: Full size 18key keyboard. Professional design, suitable for laptops, banks, schools, companies and so on. The keycap of a numeric keypad has a life time of more than 10 million times4. Ergonomic Design: ABS material, compact and slim design, numeric keypad is easy to carry around, 18key numeric keypad is easy to press and quiet, ergonomic tilt and non slip pad on the back provide optimal comfort5. Power Saving Technology: Power saving technology, extended service life, don't worry about your laptop numeric keypad batterySpecification:Item Type: Numeric KeyboardMaterial: ABSKey Life: More Than 10 Million TimesType: 2.4GHzKey: 18 KeysProduct Size: Approx. 140 x 86 x 20mm / 5.5 x 3.4 x 0.8inBattery: 1 x AAA Battery (Excluding)Interface: USB.Package List:1 xNumeric Keyboard 1 x USB ReceiverNote:The device is delivered without batteries Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.