Product Description The QZ99 Passive Noise-Reducing Over-Ear Headphones from KOSS are designed to make the world disappear. Pneumalite(TM) ear cushions and an extra-secure headband help with passive sound isolation, allowing for listening without outside noise. A volume control is located on the ear cup for maximum ease of use.The Koss QZ99 headset is a passive noise-reduction stereophone system that isolates the listener from ambient sounds, allowing clear and focused listening of the intended aural signal. Ideal for use with racing scanners and metal detectors, it includes a volume control on the earcup for easy level adjustment, a stereo/mono switch for added flexibility, and a single entry, 8 foot coiled cord. From the Manufacturer New advances in materials and design have served to expand the performance of stereophones. Koss' Product Development team and engineers look for the most innovative combinations of existing and new technologies to deliver the most exciting products possible. Features Frequency Response: 40-20,000 Hz Passive Noise Reduction stereophone system isolates listener from ambient sounds Ideal for use with racing scanners and metal detectors Volume control on ear cup for easy level adjustment Stereo/Mono switch for added flexibility Single entry, 8 foot coiled cord The Koss QZ99 headset is a passive noise-reduction stereophone system that isolates the listener from ambient sounds, allowing clear and focused listening of the intended aural signal. Ideal for use with racing scanners and metal detectors, it includes a volume control on the earcup for easy level adjustment, a stereo/mono switch for added flexibility, and a single entry, 8 foot coiled cord.
The Koss QZ99 headset is a passive noise-reduction stereophone system that isolates the listener from ambient sounds, allowing clear and focused listening of the intended aural signal. Ideal for use with racing scanners and metal detectors, it includes a volume control on the earcup for easy level adjustment, a stereo/mono switch for added flexibility, and a single entry, 8 foot coiled cord.

New advances in materials and design have served to expand the performance of stereophones. Koss' Product Development team and engineers look for the most innovative combinations of existing and new technologies to deliver the most exciting products possible.
Features

Frequency Response: 40-20,000 Hz
Passive Noise Reduction stereophone system isolates listener from ambient sounds
Ideal for use with racing scanners and metal detectors
Volume control on ear cup for easy level adjustment
Stereo/Mono switch for added flexibility
Single entry, 8 foot coiled cord