Gear Head KB5500W is a wireless desktop set that includes a keyboard and an optical mouse. It operates on 2.4 GHz wireless technology and has a maximum operating distance of 30 feet. The keyboard features 800 DPI and special function keys for multimedia control, calculator, research, refresh, mute, volume up/down, standby mode, and quick access to My Computer, My Favorite, Outlook Express, and Internet Explorer. The mouse requires two AA batteries and the keyboard requires two AAA batteries (all included).