Excalibur Tony Stewart Radio RD50120 EXCALIBUR RD50120 Tony Stewart Radio. Tune in to your favorite radio station, or load a CD and let our Helmet Radios stereo speakers turn your living room into an infield party. Even connect your Helmet Radio to an external audio device using the builtin audio ports. It is a great gift for any NASCAR fan. Looks great on an executive or student desk. Available in number 20 car. This sound system comes with a remote control. It also has an AMFM radio and a CD player. There is also a movable visor.