AV-JEFE VANC700 Active Noise-Cancelling Stereo Headphone_acoustic noise cancelling, cancel ambient noise headphone, Dual-prong adapter (For Airplane use), Adjustable/Attachable cord Help cut the sound of airplanes, buses, and other sources of aural aggravation. Foldable, with airline dual prong adapter, detachable cord, carry pouch Advance "active" noise cancellation technology. Provide noise canceling effect around 15dB, better than 10dB provided by most of the products in the market. With On/Off switch + LED indicator, Volume Control and Noise Canceling L/H Level Switch