We aren't always aware of it, but the mouse is the most-used computer accessory. This is why it's important to use the right mouse. This vertical mouse makes you hold it in a handshake position. This is a natural posture and prevents unnatural wrist bending while providing relief to the forearms. Using the wrong mouse can cause physical... discomfort in the shoulders, forearms, wrists and hands. With a vertical mouse you can prevent many of these complaints.