The Targus Full-Size PS/2 Optical Mouse is the perfect solution for the notebook or desktop user who enjoys using a standard size external mouse. This full-size mouse features a 1,000 dpi optical sensor to read and follow your mouse moves, eliminating erratic cursor movement and the need to clean your mouse or mouse pad. These features also allow the mouse to be used on virtually any surface where other types of mice might be rendered unusable. This is the ideal, value-priced mouse for the corporate environment. Complete compatibility with PS/2 port; no driver software is required.