The Goldtouch Semi-Vertical Mouse was created with an optimal slope of 66° for the user who wants a mouse that is midway between a traditional ergonomic mouse and vertical mouse. Unlike vertical mice, you'll have the power of gravity on your side when it comes to clicking, so you won't have to use as much movement between the thumb and fingers (which in turn can require more pinching of your muscles and nerves). Offering 3 different DPI settings on wireless (800, 1200, and 1600), as well as 4 DPI settings on wired (1000, 1500, 2000, 2500), this mouse will handle a variety of mousing needs to ensure your mouse cursor moves smoothly. Just press the DPI button and move the mouse to select your preferred mode. This mouse also comes with a detachable Ergo-grip flange accessory to handle a variety of mousing tasks for maximum comfort and performance. A second option to achieve precision mousing requires no attachment flange.