3M Wireless Ergonomic Optical Mouse, Patented Vertical Grip Design Keeps Your Hand and Wrist at a Neutral Angle for Comfort, USB Plug and Play, Soft-Touch Surface, Large Size, Black (EM550GPL);

Vertical grip provides ergonomic benefit of keeping your hand and wrist at a neutral angle. Optical sensor, wireless, and USB compatib le plug and play. Soft-touch painted surface for added comfort. For right hand use only. Large size. 2 year warranty.