Item #: Q77247. QZ-2000 Noise Reduction Stereophone features revolutionary Active Noise Reduction (ANR) stereophone system that reduces harmful and annoying low frequency sounds in noisy environments. QZ-2000 includes compact control case and collapsible stereophone for convenient travel and portability. Adjustable headband design provides maximum comfort. The package includes input jack for audio play-through and 2-prong adapter for in-flight use. Product Description: Koss QZ 2000 - headphones Product Type: Headphones - wired Localization: English Color: Black Headphones Type: Headphones - binaural Headphones Form Factor: Ear-cup Connectivity Technology: Wired Sound Output Mode: Stereo Response Bandwidth: 145 - 20000 Hz Manufacturer Warranty: Limited lifetime warranty Customers also search for: Discount Koss QZ 2000 - Headphones, Buy Koss QZ 2000 - Headphones, Wholesale Koss QZ 2000 - Headphones, 0021299126417, 126417, Headsets and Earsets