H097986. Speed of light. Optical precision. No mouse ball! Smooth scroll wheel. Programmable! Designed for Microsoft Windows XP. The Latest Optical Technology: High speed movement and pinpoint accuracy on any surface; No more mouse ball to skip and get dirty. No moving parts to break down! Quiet Scroll Wheel: For smooth web and document scrolling or zooming. Programmable Button: Scroll wheel doubles as a button that is easily customized for your favorite commands: Launch e-mail; Launch web browser; Zoom; Auto scroll; Double click; Any many more! Ergonomic Design for Both Hands: Conforms to the shape of your hands for optional support and comfort. PS2 Compatible. System Requirements: IBM or PC compatible; PS2 Port; Windows 95, 98, ME, 2000 and XP; CD-ROM Drive. Package Contents: Optical Mouse; Driver Software (CD-ROM); User's Manual. 5 Year Warranty. Made in China.