The MX Ergo wireless trackball mouse offers outstanding ease of use with a unique adjustable hinge and the ability of controlling several devices at the same time. Thanks to the adjustable hinge, the tilt angle can be increased from 0 to 20 degrees, which improves wrist posture and reduces inward rotation of the hand. The carefully sculpted shape provides full palm and finger support, while the soft rubber surface ensures a pleasant, comfortable grip for long hours of work.