3M Em550Gps Wireless Ergonomic Mouse SmallDescriptionSpecificationsShipping 3M ergonomic mouse has a vertical grip design that keeps your hand and wrist at a neutral angle, while the mouse works as a regular optical mouse Grip the handle and rest your hand on the base. Use your thumb to left and right click These mice help reduce muscle strain while keeping your arms and shoulders in a more relaxed position Wireless, USB plug and play Clinically proven to alleviate pain and discomfort of