I have an aux in jack on my car stereo and purchased a sony/ericson HBR-100 buetooth receiver. It was $80 at Fry Electronics
www.outpost.com I found it in the store but it should be online. It has nice battery life, sounds good, lookis nice, and can be used with any 3.5 mm stereo jack. It can be used in my car, home, or with any ordinary pair of headset/earbuds to make things wireless to me phone. I hated that stiff adaptor that came in the box.