Logitech® TrackMan® Marble® reinvents finger-operated trackballs with a revolutionary, four-button design. Move the ball with your finger, or use your thumb and finger for fine detail work. Patented optical Marble® sensing technology provides unmatched reliability and precision, and elim... (more)

Logitech® TrackMan® Marble® reinvents finger-operated trackballs with a revolutionary, four-button design. Move the ball with your finger, or use your thumb and finger for fine detail work. Patented optical Marble® sensing technology provides unmatched reliability and precision, and eliminates regular trackball maintenance. Click the unique wheel mode button, then use the trackball to scroll in all Windows® 95, Windows® 98, Windows® NT® 4.0 applications or on the Internet, and scroll and zoom in Microsoft® Office® 97. Personalize performance by assigning one-click commands, including draglock and double click, to the buttons with MouseWare® software. Includes a three-year warranty. For Windows 95 and Windows® 3.1. (less)