Comfortable and wireless! | The vertical mouse avoids forearm twists for better comfort and good health. The vertical mouse allows for a neutral upright posture that generally prevents the forearm from twisting. | Many users, including doctors, recommend using vertical mice for superior comfort and relief from wrist pain. Comfortable and easy to use, The shape is carefully sculpted for uncompromising comfort and its 5 easy-to-reach buttons allow full use without any twisting of the fingers.