Come with Logitech Unifying receiver, Forget the hassle, expense, and waste of frequent battery changes. You’ll have up to three years of power, Hyper-fast scrolling—one spin and you may never go back to an ordinary scroll wheel. You pop the tiny Logitech Unifying receiver in your notebook and leave it there. You can even add more devices. Plug it. Forget it. Add to it.You’ll fly through documents and Web pages with a single spin. Click-to-click scrolling gives you the precision you need when navigating lists, slides, and images.Smooth, accurate laser grade tracking, even on challenging surfaces like a polished desk
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