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 Keypad Material: ABS Model: For MC 2129RF Interface: USB Connection Mode: 2.4G Wireless Effective Wireless Distance: Approx. 10meter / 32.8ft Number of Keys: 18 Keys Battery Type: 1xAAA Alkaline Battery (Not Included). Package List: 1 x 2.4G Wireless Numeric Keypad1 x Receiver