The Evoluent4 Right wireless vertical mouse is a patented ergonomic mouse which will help you to work healthy, comfortable, and productive on your computer, laptop or mobile devices. The mouse is suitable for right-handers with smaller hands. It has six programmable buttons, a directly reachable DPI-button to adjust the pointer speed into one of the four different values (800-1300-1800-2600) that suits you best, illuminated Evoluent logo turns off when the system is in power saving mode, and a lip which supports the little finger. Right Handed USB-A dongle connectivity 6 programmable buttons 4 DPI settings: 800, 1300, 1800 & 2600 5 year guarantee (once registered) PC & MAC Compatible Requires AA Battery