Hear your music perfectly with these Koss Quiet Zone headphones. They feature active noise reduction to eliminate external noise and to boost sound quality, and powerful drivers deliver a frequency response between 40 to 20,000 Hz and sounds of up to 90 dB. The extra-comfortable headband of these Koss Quiet Zone headphones is collapsible for easy transport.
The headphones are comfortable and sound quality was excellent until I turned on the noise cancellation. That created a low buzzing noise that rendered the feature worthless.