In this world today, there's satellite everything...there's satellite TV, satellite phone....and why not satellite radio? Essentially, a satellite radio is a kind of service that one can subscribe to to receive radio service anywhere you want. You can have satellite radio service in your car, in your home, in your office or even in public locations. In order to receive satellite radio service, you'll need to subscribe to the service, so, it's not like free TV or free radio whereby any radio can receive signals for free. You will need to pay a monthly or yearly subscription fee to enjoy satellite radio. There are, in the United States, two top satellite radio services available, Sirrus and XM. Well, there could be more but these are the two leading satellite radio service providers known to date. Each of these satellite radio services provides and transmits hundreds of channels. Unlike free radio service, you'll have to tune in to each station to listen to whatever they're airing at that point in time, satellite radio gives you complete coverage from Blues to Techno, Jazz to Punk Rock in one single satellite radio service. And since you're paying for the satellite radio service, it's logical that the service is usually commercial free, except for their own commercials, of course. So, even if they do not allow other companies or people to put commercials into their satellite radio service, they retain the right to put their own infomercials and commercials into the satellite radio service that you receive. In order to have the satellite radio service, you need a special radio. Any other normal radio won't cut it because our normal household radio cannot possibly receive a satellite radio signal. However, when you subscribe to the satellite radio service, they will normally package the satellite radio receiver together with the package price. The good thing is that no matter where you are, all you have to do is to bring the radio along with you and you can receive the satellite radio service. The signal receiver is not restricted by the power of signal from the radio station. We're talking about using the Satellite to transmit radio signals, so, you can literally listen to satellite radio anywhere in the world. The biggest advantage that a satellite radio has over the conventional radio is that you will never have to re-tune your radio as you're traveling out of state or you don't need to bear with static noises when the reception is bad. With satellite radio, you're assured of high quality reception anywhere you go anywhere in the world.