RollerMouse Free 2
RollerMouse Free2 is based on our ergonomic expertise and inspired by users creating a modern ergonomic design with ultra high precision and quality. RollerMouse Free2 helps to eliminate reaching for a traditional mouse relieving neck, shoulder, elbow, and wrist pain. There is no gripping necessary, thus avoiding the threat of repetitive strain injuries such as Carpal Tunnel Syndrome and Tendonitis.
More information: http://ergo.contourdesign.com/US/product/rollermouse-free2/