DESC: The XM Radio Audio System allows users complete freedom to experience XM Satellite Radio programming in virtually any environment. The Audio System is designed to be compatible with your Delphi RoadyXT® or Audiovox Xpress® XM Satellite Radio receivers. With the integrated handle, water-resistant cover, and stylish looks, the Audio System is versatile enough to go from the poolside or boat to the kitchen. The Audio System operates on eight C-cell batteries or an AC adapter.