Enjoy a tidy workspace with wireless connectivity: reduce cable clutter with the dell wireless keyboard and mouse – km117, providing the functionality you need in a keyboard & mouse without wires.great for everyday use: plug & play with multimedia keys & hot keys to access frequently used apps & multimedia player.compatibility pcreliable wireless connectivity: connect with nano size dongle up to 10m operations with robust wireless performance.battery operated with aa for keyboard and aaa for mouse (best with polaroid batteries)