I like to watch Netflix while on the treadmill but was having trouble hearing. These headphones are just what I was looking for!

Sony usually puts out high-quality stuff, but these only cancel MAYBE 15% of ambient noise. They are comfortable and sound great, but trying them with the supplied battery and a new one resulted in the same anemic noise cancellation. They would be good if sold just as headphones.

I bought them to use in an airplane. I was disapointed. The noise canceling works poorly, I still can hear surrounding noises easily. The battery is at an odd location (on the cord). The cushion does not hug the ears well. The only positive is they are relatively lightweight.

these are one of many on ear noise canceling headphones ive listened to and they are one of the best ive heard. great amazing clear sound and very handy and accessible, light weight and great quality. great purchase!

High quality sound and make

one battery required

I'm extremely happy with this headphone. Great clear sound and very handy, light weight and great quality, It's a great purchase!

Great Sound; Comfortable; Noise Cancelling; Sound Isolation

Requires a battery for a good output

I purchased these MDR-NC40 Sony Noise-Cancelling Headphones from Radio Shack for only $30 this week.  That's a bargain for headphones that Sony still sells for $100, but as about as high as someone like me, who is not an audiophile would be willing to spend on headphones.  I have owned Sony's

Better than any that I have used, but I guess it will be better used only for flight journey, which is what was intended for anyway. The wire seems too long for the daily use and for movement flexibility, it is kind of too long. it does cancel out noise and does what it says.