Numeric Keypad Number Pad Wireless USB 2.4GHz 18-Key About this item QUIET SOFT TOUCH: Integrated ergonomic provides added comfort which helps reduce strain, great for those working on spreadsheets, accounting files or financial applications. ANTI-SLIP AND PORTABLE DESIGN: There is four non-slip mat on the back of the number keyboard, which prevents it from sliding around your desk when in use. This sturdy number pad is easy to take with you, so you can work confidently and quickly-wherever and where USER FRIENDLY: Battery indicator light lets you know when the keypad’s AAA battery is running low. Conveniently located direction control keys can be used as joystick control, allowing you to feel the thrill of playing game using a wireless device ADVANCED 2. 4 GHz WIRELESS: You will enjoy the reliability of a cord plus cordless convenience and freedom fast data transmission, virtually no delays or dropouts. Allows the keypad to function up to 33′ away from the receiver by establishing cordless workspace with standard USB interface Compatibility: Works with PC and desktop computers that have Windows 2000/ XP/ Vista/ 7/ 8/ 10 operating systems, numeric keypad is not fully compatible with Mac system. (Function keys do not work, while Number keys part works fine. Because Apple doesn’t support external keyboards with function keys)