The Verbatim/Smartdisk Nano Wireless Optical Mouse has a receiver that's small enough to plug into your laptop and leave. It offers 2.4GHz wireless performance, which means no delays in cursor movements and fewer cords to pack. The receiver also slides right into the bottom of the mouse for safekeeping. Its sleek design offers a smooth, contoured comfort grip for right or left hand use and a programmable roller button, which means you can assign your favorite features to the roller and make your work easier. If you need a mouse that travels well in tight spaces, this mouse is for you. Small enough to fit easily in work totes, backpacks or even handbags, this mouse makes it super easy to go Nano.