This product requires the GROM aux in box, which is sold separately. But having the two together works a charm! The audio is clear and it is significantly louder than using an aux headphone cable. Installation is pretty easy, thanks to a simple product design and good documentation. I bought this after my cassette deck broke and I could not use cassette adapters that I can stream audio with Bluetooth directly to my car, I can not believe I ever did it any other way! It is a little expensive, but well worth it if you spend a lot of time in the car.


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