Adesso Mouse E90 Wireless Lefthand Vertical ErgonomicDescriptionSpecificationsShipping E90 Wireless Left Handed Vertical Ergonomic Mouse is designed with a vertical orientation and a contoured shape that provides a uniquely comfortable user experience. Designed specifically for left handers, this wrist friendly contour support, you will hold your hand in a healthy handshake position which is the neutral position of your forearm. This feature prevents your forearm from twisting when using this vertical