This advanced desktop set includes the Fingerprint Reader to eliminate password hassles, and extended battery life to provide longer wireless freedom. And the Wireless Optical Mouse with Tilt Wheel Technology offers total maneuverability. Features Fingerprint Reader Whenever your PC or a favorite Web site requires a password or username, simply log on with the touch of your finger. Tilt Wheel Technology The entire wheel tilts to deliver smooth, accurate performance as you scroll horizontally and vertically through documents and Web pages. My Favorites keys Five customizable keys are as easy to set as your car radio, so you can enjoy convenient, one-key access to your favorite Web sites and files. Multimedia Center It's easy to access your favorite music, video clips, and media programs with the press of a key. Optical Technology An optical sensor tracks mouse movement, giving you greater durability, increased speed, improved accuracy, and more consistent performance.