ShuffleBud is just a small (5.6 grams, 47mm X 16mm) USB to 3.5mm adapter that enables you to plug your 2G shuffle directly into an available USB port without having to use the iPod shuffle dock, making it much more convenient to shove in your pocket or clip to your bag with the included lanyard loop for those who are always on the go and don't need more gear in their bag..