FULL-SIZE COMFORT: An ambidextrous, comfortable shape is comfortable in both hands, making you feel more at ease while working and even after the day is over. CONVENIENT CONTROLS: You can scroll both horizontally and vertically and zoom in or out instantly with side-to-side scrolling and zoom. ideal for working with presentations and spreadsheets. ZERO SETUP NEEDED: With flexible wired connectivity, you can use the cable straight out of the box by simply plugging it into your USB or PS/2 port. PRECISE CURSOR CONTROL: You can edit documents and browse the Web more effectively with accuracy thanks to the 800 dpi sensitivity. BUILT BY LOGITECH: Unlike other manufacturers, we have incorporated our quality and design into over a billion mice.