The Adesso 3 button desktop optical mouse is full sized with scrolling features to make navigating your computer a breeze. No more cleaning of your mouse ball and no more need for a mouse pad. It works on many different kind of surfaces like wood and plastic. Navigate quickly and easily with the convenient scroll wheel. Connector/Port/Interface: USB 2.0; Left/Right Hand Use: Left/Right; Mouse Technology: Optical; Wired/Wireless: Wired.