How to play music in car through iPhone 5?

I DON'T have an aux port in my radio (I wish I did)
I have a cigarette lighter of course. So what device would you recommend I buy so that I can hook my iPhone 5 up to this cable and listen to music in my car?

FM transmitter

You can't get music through a cigarette lighter. But you could buy an FM Modulator. It broadcasts your iPhone music on a weak FM signal, and you just tune your radio to whatever station it picks.

An Fm Radio Transmitter! Here is a link!:

http://www.ebay.com/...0872920078

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