PREVENTS WRIST DISCOMFORT - Evoluent’s ergonomic VMDMW gently supports your right hand in an upright neutral position. The patented shape prevents you from twisting your forearm like what you usually PROGRAM YOUR MOUSE TO YOUR NEEDS - Install the Evoluent Mouse Manager onto your computer to configure the VerticalMouse’s buttons. Not only can you change their function but you can also set how the b GROOVED BUTTONS - Your fingertips rest in a shallow groove on the buttons. This patented innovation secures the mouse in your hands and makes moving it much more precise. ADJUST MOUSE-SPEED FROM LOW TO HIGH - You can adjust the pointer speed from low to high with the optical sensor controls on the side of the mouse. There is no need to release the grip for speed adjust WIDE RANGE OF COMPATIBILITY - USB wireless, and is compatible with Windows XP, 7, 8 and 10, Mac and Linux Systems.