This mouse utilizes Blue Track, the newest in optical tracking technology. It tracks faster and easier on a wider range of surfaces than laser--even on glass! The full-sized ergonomic design provides hours of greater comfort for easier use. Browse through the web or documents rapidly with the backward and forward buttons at easy reach on the side of the mouse. Rubber grips add to the comfort and ease of use. Connector/Port/Interface: USB; Left/Right Hand Use: Right; Mouse Technology: Optical; Wired/Wireless: Wired.