The tiny wireless receiver can easily remain permanently plugged into your notebook, even when you're carrying it around. You can also easily add a compatible keyboard or mouse. Learn more about the Unifying receiver. Fly over long documents and Web pages with a single movement. Use step-by-step click-to-click scrolling to precisely browse lists, slides, or images. Laser precision gives you even smoother scans on virtually any surface. Optimized for the right hand, the hand-friendly shape gently guides the hand into a naturally balanced position for relaxed working.