DESC: PlayDock XM is the best sounding satellite radio player available. With PlayDock XM, you'll enjoy XM Satellite Radio programs in gorgeous, full-bodied sound. Let PlayDock XM be the transportable home base for your Roady satellite receiver. The included AC power adapter provides unattended, continuous charging of the PlayDock XM's battery when connected. So you're free to use the PlayDock XM in any room in the house or outdoors! Transportable design features two main speakers and a powerful bass speaker! Included AC adapter powers Roady, charges PlayDock XM Speaker System's internal battery PlayDock XM plays for hours in the backyard or porch without AC power. PlayDock XM Portable Amplified Speaker System by Cambridge SoundWorks is the first stereo music player specifically designed for the Delphi Roady (Roady XM Satellite Receiver sold separately).