Logitech Unifying receiver The tiny wireless receiver stays in your notebook, so there's no need to unplug it when you move around. Plus you can easily add a compatible keyboard or mouse.Learn more about the Unifying receiver. Hyper-fast scrolling 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.Excited about hyper-fast scrolling? Laser tracking Laser precision means you'll enjoy smoother tracking on just about any surfac Specifications: Sensing method: Invisible laser Resolution dpi: 1000 Buttons: 8 (including horizontal scrolling including ) Scroll Wheel: Yes ( fast scrolling function) Horizontal scroll: Yes Battery: 2- AA type batteries Operation distance; Up to 10m Wireless system: Advanced 2.4GHz wireless technology Size Dimensions: (height x width x depth): 70.0 x 109.0 x 40 mm Mouse weight: 135 g Package Contents: Logitech Marathon Mouse M705 Logitech Unifying receiver