Summary: These Panasonic noise canceling headphones are perfect for watching Netflix and Amazon movies on our Roku box while one of us sleeps. There is no "noise bleed" in even the loudest movies (Terminator 2 comes to mind). My wife can watch the movie while I sleep undisturbed. Let it be said, they are NOT the superb Bose noise cancelling headphones (which generally sell for nearly $300).
Summary: Works without batteries as standard headphone. Batteries needed for noise cancellation. My old Panasonic headphones traveled with me all over the US and finally bit the dust after many years of good service. This one is a good replacement. At least so far.
Excerpt: I'm on the road about 100 days a year - often by air; and I thought noise-cancelling headsets made a lot of sense while flying. I had the pleasure of using my friend's Bose 300 over-the-ears one time and there's no question they're the gold standard. Instead, I've now bought two lower-priced sets...this one comes recommended by most reviewers. Well, they're perfectly fine, but they probably only cancel out 20% more noise than ordinary over-the-ear headsets.
Excerpt: I was a little skepticle buying these headphones because of the price. After seeing some noise cancelling headphones selling for 10 times the price I wasn't sure how good they could be. I was pleasantly surprised on how good they worked. There is a noticable difference when you turn on the noise cancelling. It does knock the backround noise down to a nice level.