I use a cassette that plugs into the headphone jack of my iPhone and iPod in my truck that has CD and cassette. Is there such a thing as a Bluetooth Casstte? I like the simplicity of the cassette over the FM Transmitter as anytime I want to listen to my music I just push in the casstte, unlike our transmitter that has to be tuned to the preset station every time. Plus the cassette has no static. Just a thought.