. Lightweight and portable - with a redesigned wheel optimized for great scrolling sculpted ergonomic design and dongle-free Bluetooth connectivity - new Microsoft Modern Mobile Mouse works on virtually any surface thanks to BlueTrack technologyKey Product Info . Light portable ergonomic mouse is perfect for precise navigation on the goNo cords or dongle - connects wirelessly to your Surface via BluetoothEnhanced wheel is optimized for smooth natural scrollingWorks on virtually any surface thanks to BlueTrack technologyElegant sculpted design - sits comfortably in your hand Product Features Ultra-precise movementMicrosoft Modern Mobile Mouse helps you stay productive and in the flow with flawless transitions between devices patented magnetic scrolling for precise control and a customizable design with three programmable buttons. More ways to multi-taskMicrosoft Modern Mobile Mouse gives you more multi-tasking power by allowing you to pair with and work seamlessly across up to three computers. Supports both Bluetooth and wired USB connections. Experience high level of controlMicrosoft Modern Mobile Mouse supports your most detailed projects with carefully calculated weight stability and control for easy manipulation. Ergonomic details for hours of comfortMicrosoft Modern Mobile Mouse was created for long hours of work with thoughtful ergonomic details including side grips a thumb rest and an elegant curved shape that conforms to your hand.