DESC: Re-engineered for portability. Delivers all the performance of the acclaimed SoundDock(R) digital music system with the added convenience of portability. Slim design. Powerful performance. Patented waveguide speaker technology and powerful neodymium speakers engineered specifically for the SoundDock(R) Portable digital music system enable a smaller, slimmer profile while delivering the kind of performance you'd expect from Bose. Proprietary acoustic design allows this elegant system to reproduce audio more efficiently and with higher quality than other battery-powered speaker systems. Rotating dock folds neatly inside the main enclosure so the SoundDock(R) Portable system can easily slip into the SoundDock(R) Portable bag (an optional accessory). Also serves to protect the dock as you move it from place to place.