2MOUSEP2 - OPTICAL SCROLL WHEEL MOUSE -- 1. Key Tronic has made improvements to the shape of our optical mouse to make the product user friendly for both right and left handed people. The product has the same great quality and the 2 buttons with scroll wheel. 2. The 2MOUSEP2 mouse meets the European Union RoHS initiatives.3. This optical mouse will glide across your desk without having to use a mouse pad. It can be used on almost any surface because it uses sensors to record the movement optically. With no mouse ball, there are no parts to get dirty, so cleaning is a snap. 4. The scroll wheel makes navigating through documents and the internet easier and quicker.