This Headphone integrates a special electronic Circuit that almost eliminates interference from ambient environmental noise Noise Canceling Circuit actually senses outside noise with built-in microphones and sends an equal-but-opposite canceling signal to the Headphones usually within 40 Hz to 1,500Hz frequency range Reduces Noise by 70% (10dB) when noise canceling circuit is switched on Folding Headband and pivoting earpads make for easy Storage in a backpack, briefcase or purse (a compact carry pouch is included) Operates up to 46 hours on one AAA Battery (alkaline) - battery not included Supplied Airline Plug Adapter for compatible in-flight entertainment systems Open-air design is lightweight and comfortable 30mm Driver provides a wide dynamic range for superior Sound Frequency Response: 30 - 15,000 Hz Cord and Plug: 4.9 ft. (1.5m) cord
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Pictured above: SONY MDRNC5 Noise-Canceling Stereo Headphones
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