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Evoluent VerticalMouse 4 Mouse VM4$40.99
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 VerticalMouse provides superior comfort and even relieved their wrist pain.,The patented shape supports your hand in an upright neutral posture that generally avoids forearm