Contour Perfit Mouse Optical Contour Perfit Mouse Classic Plus Medium Large

Even if technology is moving fast, our hands don't change. That's why Contour Design holds on to the successful form factor for Contour Mouse, because it still helps to stop and prevent repetitive strain injuries such as Carpal Tunnel Syndrome and Tendonitis. In its fourth generation, Contour Mouse has updated internal electronics boasting a high accuracy 1200 DPI optical sensor. The Contour Mouse non scroll has five buttons, including a proper, full-size third (middle click) button. The three major buttons are elongated so that your fingers rest on them and are able to click with full finger extension with small, subtle motions and without flexing your fingers. Your thumb rests on the side, just above the rocker switch (performs "back" and "forth" in most web browsers).