FULL-SIZE COMFORT - A comfortable, ambidextrous shape feels good in either hand, so you feel more comfortable as you work - even at the end of the day ZERO SETUP REQUIRED - Flexible wired connectivity means you just plug the cable into your USB or PS/2 port - it works right out of the box. PRECISE CURSOR CONTROL - With 800 dpi sensitivity, you'll get precise cursor control so you can edit documents and navigate the Web more efficiently. BUILT BY LOGITECH - This mouse comes with the quality and design we’ve built into more than a billion mice, more than any other manufacturer CONVENIENT CONTROLS - Side-to-side scrolling plus zoom lets you instantly zoom in or out and scroll horizontally and vertically. Perfect for working with spreadsheets and presentations.