Step 1- Choose what type of provider you want.
XM Radio- You'll get 68 channels of commercial-free rock, country, blues, jazz, classical, and Latin, plus another 32 channels of news, entertainment, and special programming. You'll also have access to 21 channels of XM Instant Traffic and Weather.

Sirius Radio- including more than 60 original music channels of rock, jazz, rap, country, Latin, blues, classical, techno, and comedy. You'll also receive over 50 world-class sports, news, and entertainment channels. You can listen to live NFL football and NHL hockey games on SIRIUS.

Step 2- Choose what type of satellite tuner you want.
There are many types of tuners all with different sound qualities.

FM modulator- This give you an easy connection, but sound quality is generally not as good. You tune your radio to an unused FM channel to receive the signal.

Cassette Adapter- The tuner tramsits the signal through your cassette player, but the sound quality will be only slightly better than through a wireless FM modulator.

Auxiliary Input- You can add on a satellite tuner via RCA outputs for a direct audio connection. It gives you good sound quality.

In-Dash Radio w/Tuner Control- You can buy an in-dash receiver with built-in satellite controls and connect a same-brand tuner via a cable for a direct connection. Great sound quality.

In-Dash Radio w/built-in tuner- You can buy an in-dash receiver with a built-in satellite tuner. It has the best sound quality.