Koss Collapsible Portable Headphones, Standard Packaging Black, Silver

Delivers bass-enhanced high-quality sound Features dynamic elements, constructed from 1.4mm Mylar to enhance rigidity, minimize mechanical distortion & yield a full-frequency response Closed leatherette earpads Earcups rotate & fold in to collapse into a protective package Volume control on cord Padded adjustable headband Freq resp: 18Hz20kHz Imp: 100 Sensitivity: 101dB/mW 8ft straight, single-entry cord Includes gold-flashed 3.5mm plug & gold-flashed 1/4"" adapter Limited lifetime warranty