DESC: The 800 dpi resolution delivers ultimate performance and smooth cursor movement on most surfaces. Work comfortably all day whether you are right-handed or left-handed with the balanced and weighted design. It offers 4-way scrolling utilizing Tilt-Wheel technology providing you an exceptional navigation experience and the ability to scroll applications vertically. You can also push the wheel from side to side and scroll pages horizontally. In addition, you can program the button wheel to perform a different function such as opening your browser. The Toshiba Bluetooth Optical Mouse offers you the best in mouse technology with wireless convenience. A Bluetooth-enabled computer or the Toshiba USB Bluetooth Adapter is required.