Feature:1. 2.4GHz Wireless:2.4GHz wireless technology, stable signal transmission, lag free digital keyboard, 32.8ft transmission distance.2. Chocolate Keys: Chocolate keys, light and silent keys, greatly improve your work efficiency, ABS material, compact and slim design, easy to carry.3. Ergonomic: Ergonomic tilt provides extra comfort and helps reduce stress, perfect for those working with spreadsheets, accounting documents or financial applications.4. Compatible Systems: Number pad is compatible with number keyboards for Android tablets, for Linux, desktop, for Windows XP ,for Vista, for Windows 7, for Windows 8, for Windows 10.5. Plug and Play: Simply plug the receiver into a USB port and start processing numbers immediately. No drivers required.Specification:Item Type: 2.4G Wireless Numeric KeypadMaterial: ABSModel: For MC 2129RFInterface: USBConnection Mode: 2.4G WirelessEffective Wireless Distance: Approx. 10meter / 32.8ftNumber of Keys: 18 KeysBattery Type: 1xAAA Alkaline Battery (Not Included).Package List:1 x2.4G Wireless Numeric Keypad1 x Receiver