Until now, you had to spend much more to get a quality pair of noise cancelling headphones like these. From industry leader Pioneer, they actively cancel out 90% of ambient sound so on a plane, on the road or in a crowd, the only thing you'll be thinking about is how much you're enjoying the sound of your audio source. Also features industry-leading battery life of up to 120 hours, 3.5mm jack, 4.9' cord and compact folding design. Comes with carrying case for easy portability. 1 'AAA' battery included. 1-year limited warranty.