3M Ergonomic Mouse EM500GPL Large Ergonomic design keeps the arm positioned for natural, comfortable movement. Clinically proven to reduce muscle strain and discomfort associated with Carpal Tunnel Syndrome and repetitive stress injury. Compatible using any USB port computer. Vertical grip keeps your hand and wrist at a neutral angle, while the mouse works as a regular optical mouse. 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. Large size.