 | The Koss® QZ/999 noise reduction stereophones utilize a Passive Noise Reduction stereophone system that isolates you from ambient sounds. They have a volume control on earcup for easy level adjustment and can be used when operating racing scanners and metal detectors. Cable, Consumer, Stereo, Over the Head, 40 Hz - 20000 kHz, 60 ohm, 102 dB Number of Reviews: 3 | Ratings:  | Best deal: $45
$45 - $54 from 3 stores. |