Koss 180125 QZ99 Wired Over-Ear Headphones with Earcup Volume Control, Stereo/Mono Switch, and 1/4-In. Connector, Passive Noise Reduction
• 44-mm neodymium magnet structures deliver outstanding clarity and definition;• Frequency response: 40 Hz to 20 kHz for accurate acoustic sound reproduction with a wide frequency response;• Sensitivity: 102 dB SPL/1mW;• Passive noise reduction; closed, fluid-filled leatherette ear cushions form comfortable seal around ears, enhancing bass frequencies and decreasing ambient noise;• Adjustable headband adapts to any head size and shape for added comfort;• Oxygen-free copper voice coils improve signal transmission and conduction for cleaner, clearer sound;• Volume control on ear cup allows easy level adjustment;• Stereo/mono in-line switch extends user flexibility;• 8-ft. (2.4-m), single-entry coiled cord with 3.5-mm plug and 1/4-in. adapter;• Limited lifetime warranty;