Evoluent VerticalMouse 4 "Regular Size" Right Hand (model # VM4R) - USB Wired
Avoids forearm twisting for comfort and good health. 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.