These are really remarkable devices and the sound is terrific. They don’t cost much and they sure come in handy when exercising. You can probably find one for about $50 that will do everything you need. And some cars have a plug in that you can just run through your car radio. That’s a great feature that I like out in the boondocks where the radio reception is poor unless you want to shell out for Sirius or XM.
My son’s car has an iPod formatted digital connector in the central storage bay between the front seats. It keeps the iPod charged, links it to a control right on the steering wheel, and displays the song/artist information on the dash.
It’s great, and it’s iPod specific.