Title: Did not perform as advertised.
Product review: I returned the JVC HANC100 Noise Cancelling Headphones within a week of my purchase. The noise cancelling function only amplified the outside sounds. When using the headphones with my MP3 player, I had to increase the volume to an unacceptable level to hear the music. I have purchased many products from amazon.com and this is the first I have ever returned. I unfortunately can't recommend the JVC HANC100 Noise Cancelling Headphones.
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