The wireless SRM mouse is for right-handed use and is suitable for someone with a small hand. The Evolution SRM mouse has an optical sensor and has 4 buttons, including scroll wheel.
TheEvoluent C wireless is the streamlined version of the Evoluent-series and has amodern design. This is the wireless version. Because of the handshake positionof this vertical mouse, the wrist bends less aside and the forearm less to theinside, and therefore, the joints, muscles and tendons have a way more naturalposition.