Koss UR29 Full-size Headphones (pack of 1 Ea)Package: 1 Ea Delivers bass enhanced high quality sound Features dynamic elements, constructed from 1. 4mm Mylar(R) 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: 18Hz 20kHz Imp: 100ohm Sensitivity: 101dB mW 8ft straight, single entry cord Includes gold flashed 3.