Koss UR-20 Home Headphones Leatherette ear cushions deliver maximum isolation. Connectivity Technology: Wired Durable design Dynamic elements for extended frequency response Freq resp: 30hz20khz Imp: 32 High fidelity stereophone utilizes neodymium rare earth magnet and 16 micron mylar element for deep bass and treble clarity Flexible headband with sling allows for easy, single sided listening and maximum durability Straight, single-entry, 8-foot cord for home and portable use Includes 1/8-inch and 1/4-inch stereo plugs for home and portable use Perfect for deejay use