Reduces outside noise by 92% (22d B) at 200 Hz. Bio-Cellulose Diaphragm reproduces pure & precise sound. Feed-forward cancelling system with new driver provides high-quality sound reproduction even when noise cancelling circuit is off. Two noises cut filters for low & high sound frequencies. Ergo-design Ear pads for long listening comfort. Hard case included 34 hours long operation time with 1x AAA Alkaline battery. Frequency response: 10 Hz
- 30k Hz.