Adesso 3-Button Desktop Optical Scroll USB Mouse Multi-PacksThe Adesso 3 button desktop optical mouse is full sized with scrolling features that make navigating your computer a breeze. No more cleaning of your mouse ball and no more need for a mouse pad. This mouse works on many different kind of surfaces like wood and plastic. Features include: 1000 DPI Resolution: It provides responsive, smooth cursor control and precise tracking and easy text selection thanks to high definition optical tracking (1000 dpi).