Easy Setup: Getting started is easy, just plug the receiver into a USB port and start counting numbers right away. No drivers required. The keys are easy and quiet to press, greatly increasing your productivity! Quiet Soft Touch: Integrated ergonomic tilt provides extra comfort that helps reduce strain, perfect for those working with spreadsheets, accounting files or financial applications. ADVANCED 2.4GHz WIRELESS: You'll enjoy the reliability of a cord plus the convenience and freedom of wireless¡ªfast data transfer, virtually no lag or dropouts. Allows the keypad to operate up to 33 feet from the receiver by creating a wireless workspace with a standard USB interface User-friendly: Battery indicator light shows when the keypad's AAA battery is running low. Conveniently placed directional control buttons can be used as joystick control, allowing you to feel the thrill of playing games with a wireless device Compatibility: Works with PC and desktop computers running Windows 2000/ XP/ Vista/ 7/ 8/ 10 operating systems, numeric keypad is not fully compatible with Mac systems. (Function keys do not work, while number keys work fine. Because compatible with Apple does not support external keyboards with function keys)