those things to send you I pod to your radio

The Griffin iTrip seems to be the most popular one. I've had one for years and really like it but how useful they are for you depends on a couple of things.

First one is where you live. Mine works fine, with minimal interference, on my 30-mile drive to work, but I think we live in a relatively quiet area for local radio. I've found myself having to retune or switch it off at various points down the M6 cos of local stations cutting in. In Italy I just couldn't get it to work at all. The newest one has an autoscan feature that's meant to keep it on a clear frequency but I don't know how a car stereo then keeps track of it.

Your car's stereo also seems to make a difference in terms of interference, my Golf holds the signal fine but our old Ibiza used to get confused and pick up a local radio station instead halfway through my drive home, and our Honda gets a lot more interference.

It's not CD quality, but if you get a clear signal it's as good as any strong radio station.

 

maybe the new ones use RDS when they hop frequencies so the stereo can find it?
you are going to much better off finding a way to get an aux cable into it. For my BMW I bought a gizmo that pretended to be the optional cd changer that just had an aux on it

 

My wife was happier with the modulator in her car when the external radio aerial fell off weakening all the external signal. Otherwise on a journey of 100 miles there would always be a hill top where BFBS radio would fill up the only free slot on the band in Wiltshire


Better to go for something like the hard wired fake CD changer with line - in as suggested in other postings. Quite a few stereos have the connector.