JVC HANC80 Noise-Cancelling Headphones - 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 40mm Driver Unit Cushioned Head Band Carry Pouch &amp; Plug adaptor