This wireless mouse is specially designed with a vertical shape which provides a uniquely comfortable ergonomic mouse experience. Antimicrobial coating resists germs and bacteria on the mouse surface. Buttons are conveniently located on the side allowing for intuitive control and faster back and forward browsing. The switchable dpi (1000\/1600\/2400) provides for two levels of control. Its optical sensor tracking method lets you work on most surfaces with better speed and accuracy. It includes a nano receiver to offer you up to 33 ft of wireless freedom and eliminates the constraints that wired mice often cause. The iMouse A20 is plug and play and requires no drivers.