It's a free movement Experience the difference.Our latest innovation, 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.