If you have an older car that’s loaded with only a cassette player, you may want to check out ION’s Bluetooth adapter.
The Cassette Adapter Bluetooth pops into the tape deck and connects to your Bluetooth-enabled device to pump music through your car’s system. What’s cool is that it pretty much converts anything. If you have an old tape player at home, you can connect your device to that, too.
Sure, there are other solutions, and some may sound better or offer easier connectivity, but this is a great solution for those who don’t have an AUX in, or more modern car system.