The Logitech TrackMan ® Marble ® offers outstanding comfort for both hands. The ambidextrous design offers left-handed and right-handed long-lasting comfort. While surfing in the Internet, you can use the convenient buttons to switch between pages visited and herblattern. If you press the large keys at the same time, you can use the ball automatically scrolling. The fingertip makes possible a fast and accurate controlling of the mouse pointer and the patented optical Marble ® technology ensures a quick scanning.