The new Koss Noise Reduction headphone was designed for treasure hunters who operate their detectors in very noisy environments like oceans, city parks or any area that the outside noise is at a high level.
Koss has designed this headset with a very good PASSIVE NOISE REDUCTION SYSTEM. It is this passive system that enables these phones to cloak over 90 percent of all outside noise. This headphone is very well made and will last for many years. This is one high quality set of headphones.
Stereo/Mono Switch for Added Flexibility
Single Entry 8 foot Coiled Cord
Frequency Response - 40-20,000 Hz
Impedance - 60 Ohms
Sensitivity - 102 dB SPL/1mW