The Adesso 3 button desktop optical mouse is full sized with scrolling features make navigating your computer a breeze. No more cleaning of your mouse ball and no more need for a mouse pad. Our mouse works on many different kind of surfaces like wood and plastic. 1000 DPI Resolution It provides responsive, smooth cursor control and precise tracking and easy text selection thanks to high-definition optical tracking (1000 dpi). Optical Technology Features optical technology to work on virtually any surface, with improved speed, accuracy and reliability, without the hassle of clogged mouse ball. Metal Scroll Wheel Navigate quickly and easily with the convenient scroll wheel