My husband does not have a bluetooth built in to his car, so I thought we could try this transmitter to see how it works for him. He listens to a lot of things via bluetooth on his way home from work, having a 30 minute commute, and often doesn't want to rely on just the radio. This allows him to connect to his various apps on his phone, plug it in to his car, and listen through the car radio rather than through his phone which is not loud enough for his likes. I don't know if it is really bluetooth or aux connection, though, since you have to plug it in with an aux cord. It is working okay for him so far. He has been pleased with the performance, though he still has to turn the radio up louder than when he is using it by itself.
Get yours here: https://amzn.to/2Dilfdr