Web Track II saves valuable minutes because when you're on the World Wide Web, you need all the help you can get. Web Track II has a durable, high-impact molded housing that expands and provides multiple adjustments, while pivoting easily. Created with the knowledge that hand sizes and tolerances differ, only Web Track II allows you to experience superior hand support and maintain a relaxed and aligned wrist with the expandable, multi-directional trackball.??Perfect for the large, medium or small hand sizes Web Track II minimizes stress and optimizes use. Adjust the Web Track II and quick, accurate thumb-control is effortless. Your fingers now easily rest over Web Tracks three buttons, providing the high performance, speed and accuracy you expect. Web Track II Navigates easily through cyberspace, games and applications with the opto-mechanical trackball providing dynamic resolution up to 6000 dpi.