From the Manufacturer
The Belkin F5X005 Auto Power Adapter for XM provides unlimited power to your XM satellite radio receiver whenever you need it, through your car's cigarette-lighter port. An illuminated LED indicator alerts you that your auto power adapter is properly connected. The FX005 is compatible with the Xpress, RoadyXT, MyFi, TAO XM2go, and AirWare, and it includes a Belkin one-year warranty.
Enhances Xm Satellite Radio Receiver In Car Provides Unlimited Playtime In The Car Attaches Securely To Cigarette Lighter Adapter Monitors Connection With Led Indicator For Use With Delphi Roady Xt Audiovox Xpress Delphi Myfi Tao Xm2Go Pioneer Airware Pioneer Inno Samsung Helix & Samsung Nexus