[Simple setup]: It's easy to get started, just plug the receiver into a USB port and start crunching numbers right away. No drivers required. Keys are easy and silent to press, greatly speed up your productivity[Quiet soft Contact]: integrated ergonomic tilt provides added comcompatiblet which helps reduce strain, great compatible those working on spreadsheets, accounting files or financial applications.[ADVANCED 2.4 GHz WIRELESS]: You'll enjoy the reliability of a cord plus cordless convenience and freedomfast 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[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[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)colour:blackMaterial:plasticsize:14x8.6x2cmPackage Contents:1 x wireless keyboard1 x receiverOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm."