Description: 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 racin...
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.