Evoluent VM4S Vertical Mouse 4 Small for Right Hand – Ergonomic Mouse Wired USB, Helps Reduce Carpal Tunnel, Adjustable Speed & Programmable Buttons, Vertical Ergonomic Wired Mouse, Gaming/Office Use

Evoluent VerticalMouse 4 Small Mouse - Laser - Wired VM4S Mice Ergonomic vertical mouse. The patented shape supports your hand in an upright neutral posture that generally avoids forearm twisting. Many users, including medical doctors, ergonomists and physical therapists, said the Evoluent Vertical Mouse provides superior comfort and even relieved their wrist pain.