Logitech Wireless Mouse M560 - Light Silver Full-size, sculpted design: Cradles your hand comfortably, hour after hour Windows 8 edge menu button: One-click access to apps, search, settings and more Thumb buttons: Easy-switching between the traditional Desktop and Windows 8 Start screen Hyper-fast scroll wheel: Two ways to scroll free-spinning or click-to-click Unifying receiver: Practically disappears in a USB port and connects multiple compatible wireless devices