The MX Vertical was developed and tested according to the criteria of leading ergonomists. Its unique 57° vertical angle promotes a natural hand position and reduces muscle strain by 10% compared to a traditional non-vertical mouse. Its best-in-class 4000 DPI high precision sensor results in four times less hand movement compared to a conventional mouse with a 1000 DPI... sensor. Overall, it promotes a more ergonomic posture that allows your team to work comfortably and productively for hours on end.