2T47712 - JVC HA-NC80 Noise Canceling Headphone,Black Up to 75% noise reduction (more than 12dB at 300Hz) Dual noise cancel mode - "wide" and "low" Flat foldable design Powerful neodymium 30mm driver unit Frequency Response: 10 - 22,000 Hz Dual Mode Noise Cancel Headphones (High/Low Range) 75% Noise reduction