i just tried the site and its down for maintenance. but i believe that this comes with its own antenna and plays through a fm channel on your radio.. if you want it to play with oit this..(better sound) you need a FM Direct Adapter.. around 30 bucks. but if you want Sirius radio this seems a pretty good deal. i have Sirius at home in the car and on my droidx. i could not live without it..(ok, well maybe) and, fyi. i put something similar in my parents Tahoe. they are using the fm station, and it sounds pretty good..
