Follow me here. I picked up a Jabra BT3030 several years ago. It is sold as a Bluetooth headset -- and I use it that way on my bicycle. But the ear buds are detachable so when I'm in a car without bluetooth, I simply unplug the ear buds and use a short mini male to mini male stereo connector to connect to the aux in on the radio. It is rechargeable with the same mini-usb cable the phone uses so I can have it on for long runs. For forty-some bucks or so, it is a handy gadget to have around. Here is a link to a newer version.