I bought the iriver mobile transmitter hoping that i would be able to listen to my mp3 player through my radio. I like the fact that it is easy to use and that you can choose your station, but i live in monroe and we get stations from toledo and detroit, which is a problem because most or all of the stations are occupied or have interference and the transmitter is not strong enough to block out the slight interference from far away stations. I didnt think to check to see how many stations i could use for this product, looking back, i should have. i would only recommend this transmitter if you live somewhere that there aren't many stations that you can listen to on the radio