The Evoluent™ VerticalMouse™ 2 has a patented new shape that supports your hand in a relaxed handshake position and eliminates arm twisting. Once you experience the superior comfort, you will never go back to ordinary mice.<br /><br />The patented shape supports your hand in a relaxed handshake position that eliminates forearm twisting. You will quickly become accustomed to the improved comfort. An ordinary horizontal mouse requires your forearm to twist away from its natural position.<br /><br />The grip is the same as an ordinary mouse, just turned sideways, and the buttons are operated by the same fingers. There is virtually no retraining necessary. The mouse does not move sideways when clicking with normal force. Pointer control is as accurate as any other good mouse.