_I'm looking at getting one of those intent of that gold on the rear of a vehicle. It looks almost like a fish fin antenna. I'm not sure what they're called but I like to call them fin antenna. I guess my questions on the matter are, what are the views for and why are they in the location of where they are, and what do they do? I want one for my car but I don't know what it does. Good pick up digital radio or satellite radio or how do they work. And how much of the cost. And word I buy them?