Well in my case, it works in regular portable or home radios which you can plug into the wall, I had bought it for the car stereo because that is they way I would listen to my ipod or cell phone, but it appears that this cassette doesn't work on my car's cassette player. So it is not the cassette's problem it is my car that doesn't take it. I do recommend this product because it actually works but it may vary on the players you use it on. Good luck.
I purchased this product, took it to my car, inserted it in my cassette deck and VOILA music from my ipod shuffle transmitted clearly and perfectly. Just what I needed for my old but reliable car!
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