Not noise cancellation
358021
Love these,  my only complaint is the background noise  the person on the other line can hear
1617916
There are no noise canceling. The power on button for the voice cancelling "system" is just a gimmick  with a red led on it. The sound is on par with any other headphone at this price although the bass is pretty weak. Not the most comfortable panasonic device and the design is pretty ugly.
3869043
Great headphones if you have noise canceling turned off... however, when on (the reason I bought them), there is no music.  All you can hear is static which is designed to drown out the background noises.

Luckily, got these on a lightning deal for $17, but would have been more than angry if I paid full retail (or even prime rate of $50).

Save your money, DON'T BUY THESE!
1072026
no noise cancellation the mic was terrible and they weren't bearable to wear for long periods i'd rather buy a kraken pro or a corsair void at this price range
3025966
Noise cancellation dosent work very well. Inside works great outside and in a vehicle not so much.
Bose series 2 was the best bluetooth I have owned
829094
They looks nice, the sound is OK for my. They are small though, if you use reading glasses they are going to discomfort your ears. Not a good noise cancellation also.
I'm not an expert in sound quality or headphones, I only can share my experience with this item compared with other that I already have for the same price or similar.
JVC HARX500 Over-the-Ear Headphones has the same price but are bigger and much better noise cancellation. Probably there are other but I don't know about them.
2124826
I bought these for a 8 hour trip from US to South America, and tried using them with the airline jacks for the in-flight movies and also for music.

There was absolutely no noise cancelling effect. The jet sound could be heard absolutely the same, with or without the earphones in.

All in all, it's a high price tag for non noise cancelling headphones.
1350764
Nice quality, but do not cancel noise as I expected.
Returned.
323448
Noise cancelling of the microphone was not better than normal apple headseat. Used it in a hotel lobby and had to revert to apple headset as the noise levels were too high.
739107
turning the ANC feature on shows no noticeable noise reduction compared to when it is off, you can hear light tapping or light talking just as well as any other headphone that cost half the price, when ANC is off the music sounds horrible but sounds better with ANC on, do not get these for noise cancellation. when you tilt your head with ANC on the speakers can make a loud vibrating/ humming noise that sounds like a helicopter and can become louder then the music. the ear padding is also a little on the thin side, not a big problem but it should have a centimeter or two more of thickness. i have tried contacting Naztech a few times through email and phone call and leaving messages, no reply from them.
3769225
Not magnetic and breaks very easily and does not have background noise cancellation for ppl calling u so it makes it difficult for ppl to hear u
4339292
Bought to drown out city noise while I fall asleep.  I found absolutely no benefit/change when turning on the "noise cancelling" function.  None.  Whatsoever.  Definitely not worth the money.  Going to try out some over the ear options instead.
3460802
These headphones were a bad decision on my part. They advertise Noise Reduction, but I think the NR creates more noise than it attenuates. If there is any breeze or wind, you get this maddening low frequency sound. If there is no breeze or wind, the music is louder but I didn't notice any active noise reduction. With the noise reduction turned off, the headphones are decent, but a bit boomy for my tastes.
4252486
These are really uncomfortable and are not noise cancelling, you can hear everything through these. I bought these for sleeping in because my husband snores. I was really disappointed and went back to foam ones after trying these.
3554904
I got these headphones to block the sound of people talking at work, and they did not meet my expectations.  I expected these headphones to block out a lot more sound than they do - with no sound playing through the headphones, they have almost no sound-blocking effect in my office setting.  I now play white noise through them, which works to block distractions.  These are made to block airplane noise, and I have not tested them on an airplane.
424230
These should not be called active noise cancelling headphones.  I tried them out around various background noise sources and there was no difference in the ability to hear the background noise with the headphone's ANC feature turned on or off.  The only cancellation came from the fact that they are over ear headphones and isolate you from the external sounds.

The headphones themselves are decently made and comfortable.  Bluetooth connectivity was easy and worked well and the headphones worked over a good range from the music source. If you just wanted a pair of Bluetooth over-ear headphones these might serve but they don't do anything to block out external noise.
3233653
VERY poor noise cancelling!  I bought for the lawn mower and they were completely ineffective and useless.  Very disappointed and returned.