Easy installation No driver required, just plug it in and go. Life can be that easy. 1600 DPI high-definition tracking engine You’ll enjoy responsive and smooth cursor control with the 1600 DPI high-definition optical tracking engine. Anti-slip scroll wheel Scroll up and down function greatly facilitates your daily work or web browsing. The anti-slip pattern on the scroll wheel ensures fast, easy and accurate scrolling. Full-size, ambidextrous design Designed to suit either hand. With the full-size shape, you are not easy to get tired even for hours’ operation.