Ergonomic, split-key design & sculpted mouse follows the natural shape of your hand for superior comfort. Laser mouse precision offers 20 times the tracking power of a standard optical mouse. Keyboard's convenient hotkeys provide one-touch control of music or video playback as well as effortless access to applications, games, folders & Web pages. Innovative mouse features a tilt wheel that lets you scroll pages top-to-bottom or side-to-side & five additional programmable buttons that may be assigned to multimedia functions or browsing controls. The keyboard's detachable soft-touch palm rest gives extra support to users' wrists. Zero-Degree Tilt ™ helps to reduce fatigue by giving typists a remarkably natural platform. For Device Type: Computer; Maximum Wireless Range: 6 ft; Connector / Port / Interface: PS / 2; USB; Wired / Wireless: Wireless.