Right-handed comfort in a ergonomically-designed plug-n-play mouse. The Kensington Pro Fit Full-Size Mouse USB has an ergonomic, right-handed shape with a soft rubber grip for all-day comfort. It features a high-definition optical sensor with a pointer speed quick-select button for enhanced productivity. It has the plug-and-play reliability of a wired USB connection. Features include a central scroll wheel with a middle button..