The R-Go HE Basic vertical mouse has an ergonomic shape that gives your arm and hand a natural, relaxed posture. This natural, ‘thumbs up’ posture encourages larger mouse movements, which are healthier than small movements from the wrist. This relieves the small muscles and tendons in the wrist and hand, helping to prevent uncomfortable complaints such as RSI. Be sure not to set the mouse’s cursor speed too sensitively, otherwise you will probably still make small, cramped movements. This mouse has been deliberately designed to be lightweight, so you need less muscle strength to move it.