Evoluent VM4S VerticalMouse 4 Right-Hand USB Wired Mouse (Small Size)The Evoluent VerticalMouse 4 Wired Right Hand Mouse offers a new twist on the classic computer mouse, one that keeps your hand vertically in a handshake position while you're pointing, clicking, and scrolling. That means your arm sits neutrally without twisting, which is designed to afford extra ergonomic comfort during extended sessions. Unique Design The shape of the mouse is sculpted for superior ergonomics, and the programmable buttons are easy to