Evoluent VerticalMouse

This revolutionary mouse uses a handshake style grip which can relieve wrist and arm pain. Ordinary horizontal mice require your forearm to twist away from its natural position. The handshake grip eliminates this twisting, improving comfort. It is easy to get used to and does not move sideways when clicking with normal force because the thumb naturally opposes the fingers. All five buttons are easy to use without contortion. The button force is light for easy clicking, but firm enough to avoid accidental activation. The buttons are programmable with different functions in different applications. You can cycle between three pointer speed settings with a keyboard shortcut or mouse button. With auto click and click lock functions, plus a break reminder.USB.