DescriptionNoise canceling headphones. Now you can choose the most effective noise cancel mode for the circumstances. We offer both "wide" and "low" noise cancellation modes. The "wide" mode targets a wider frequency range than the "low" mode, and cancels the type of noise typically found in a commercial jet cabin. The "low" mode cancels a slightly narrower and lower frequency range, one associated with trains and buses. Comes with carrying pouch and adapter, blank.