**A wireless mouse that delivers a better mix of precision & comfort--with designed-for-Web scrolling & a feel-good, contoured design.** ** Micro-precise scrolling** Designed for how you use the Web, our newest micro-precise scrolling makes reading your Facebook® or scrolling through Google® searches easier. Plus, tilting the wheel moves you backward or forward on the Web ** Hyper-fast scrolling** Your spreadsheets & documents are getting longer. Your digital photo & music libraries are bursting at the seams. & you're glued to long Web pages that have you scrolling & scrolling &.. .. To get through it all, you're doing a whole lot of scrolling. We're talking 26 feet of it in your average eight-hour day, according to a Logitech study. That's where hyper-fast scrolling comes in. When you need to do some long-distance scrolling, hyper-fast scrolling unleashes the speed demon inside. What's going on under the hood? The ratchet-scrolling mechanism you're used to retracts so the wheel can spin with virtually no friction. Seven seconds. That's how long some of our scroll wheels spin freely--speeding you through hundreds of pages or thousands of rows. &, oh yeah, it's got precision handling too. With normal click-to-click scrolling, you can navigate your lists, slides, & images with the line-by-line control you need. ** Comfortable contoured design** Based on the best-selling shape in the world, the contoured shape with textured rubber grips keeps your hand happy--even after long hours. ** Up to 18-month battery life** The long battery life virtually eliminates the hassle of changing batteries. Smart sleep mode saves power, while an indicator light eliminates surprises ** Logitech Unifying Nano-receiver** The tiny receiver stays in your laptop. Plus, you can easily add a compatible wireless device--without the hassle of multiple USB (Universal Serial Bus) receivers. ** Logitech Advanced 2.4 GHz wireless** You get