With its 1600 DPI optical sensor, this mouse works on almost any surface with astounding accuracy. Stash it in your bag with your laptop and you'll be good to go. Get to clicking real quick with USB plug-and-play. It's as easy as opening the box. Elegant ergonomic design gives you all-day comfort so you can get it all done. It feels so natural, you'll forget you're holding it. Three buttons in one mouse. Left click, right click, or center click on the dual-function scroll wheel. You've got all the control you need in one fingertip. Rest easy with an HP standard two-year limited warranty.