75% Noise Reduction..
Features: Closed type noise cancelling system. High Noise canceling capability. Long battery life. Flight 2 pin plug adaptor supplied. Driver units: 40mm. Impedance: 28ohm. Sensitivity: 102d B/m W. Power handling capacity: 1000m W. Frequency response 8 Hz-22k Hz. Plug: 3.5mm. Manufacturers guarantee.