ERGONOMIC SHAPE - Full-size ergonomically sculpted design and soft rubber grips conform to your right or left hand to be naturally comfortable
HYPER-FAST SCROLLING - Scroll through long documents or web pages faster and easier. Or press the wheel and shift to click-to-click mode for precise navigation
WINDOWS SHORTCUT BUTTON - A Windows 8 edge menu button behind the scroll wheel gives you one-touch access to the App Switcher and Charms Bar - so you can get right to the things you use most like apps, search, and settings.
LONG BATTERY LIFE - 18 month battery life and smart sleep mode help you go longer between battery changes
PLUG'N'PLAY CONNECTION - Nano-sized Logitech wireless unifying receiver stays in your computer— plug it in, forget it, even add compatible wireless devices without multiple USB receivers