| Other Features | - Revolutionary Active Noise Reduction (ANR) headphone system reduces harmful and annoying low frequency sounds in noisy environments
- Closed leatherette ear cushion for added passive noise reduction
- Cord unplugs to enjoy passive and active noise cancellation wirelessly
- Straight single-entry 4 foot cord with in-line volume control
- Fold flat for portability; carrying case included
- Covered under the Koss Stereophones Limited Lifetime Warranty | - Sensitivity as per 121 TR 9-5 : - 44 dB V/Pa
- Pick-up pattern : Omni-directional
- Transducer principle : Dynamic, closed
- Ear coupling : Supraaural
- Contact pressure : Approx. 3.2 N
- THD, total harmonic distortion : <0.5% |