3M Wired Ergonomic Optical Mouse, Patented Vertical Grip Design Keeps Your Hand and Wrist at a Neutral Angle for Comfort, USB/PS2 Plug and Play Compatibility, 6.5' Cord, Large Size, Black (EM500GPL)

Vertical grip provides ergonomic benefit of keeping your hand and wrist at a neutral angle. This mouse also offers an optical sensor, USB/ PS2 plug and play compatibility and a 6.5 ft. cord for flexible use. Soft-touch painted surface for added comfort. For right-handed use only. Large size. 2 year warranty.