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 & no more need for a mouse pad. It works on many different kind of surfaces like wood & plastic. Navigate quickly & easily with the convenient scroll wheel. Connector / Port / Interface: USB 2.0; Left / Right Hand Use: Left / Right; Mouse Technology: Optical; Wired / Wireless: Wired.