The ergonomist-approved Pro Fit Ergo Wired Mouse positions your hand for improved comfort. A built-in wrist support and neutral grip supports, cushions, and positions the wrist for comfort and neutral hand alignment. Quiet clicking makes for smooth and non-disruptive operation. Its plug & play USB connection is simple and reliable. Five buttons (including forward and back) enhance navigation and productivity. And four DPI settings (1000/1600/2400/3200) let you dial in the sensitivity and precision of your mouse cursor.