LIke the question said, so they? I mean, are they safe to use long term or do they emit radiation that collects?
For example:http://www.amazon.com/Sennheiser-RS120-Wireless-Headphones-Charging/dp/B0001FTVEK/ref=pd_bbs_sr_12?ie=UTF8&s=electronics&qid=1223149 275&sr=8-12
Also, do noise canceling also emit radiation? All that I said are not bluetooth btw.
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