John used to be able to listen to music from his phone to the radio using the headphone jack on his phone. But now he can't do that because his phone doesn't have a headphone jack. So what can he do now? Leo says that a Bluetooth cassette that he can put into the cassette player can then pair it to the phone. There's plenty of them on Amazon. EluraTech makes one for $29.99, but he can get them for half that as well. He'll want to make sure it has Bluetooth 5 though. So be sure. The player also has a 4-8 hour battery life too, depending on the model. Apple also sells a connector that goes from a headphone jack to a lightning adapter.