Evoluent VM4 Vertical Mouse
This is another vertically shaped offering whose design offers superior hand, thumb and wrist placement to significantly reduce stress during periods of prolonged use. This mouse features a four button design with a center scroll wheel that also serves as a button for a total of five buttons. It also feature adjustable sensor track speed to tailor pointer movement to your personal preferences. The mouse is offered in two different sizes as well as left and right hand models to accommodate a wide variety of users. Offered in both radio frequency wireless and Bluetooth, this mouse is compatible with both Windows and Mac OS.