Shure SRH440 Professional Studio Headphones (Black) Optimized for home and studio recording Closed-back, circumaural collapsible design Detachable, coiled cable Includes SRH440, threaded 1/4" gold-plated adapter, carrying bag, and user guide Provides exceptional sound reproduction and comfort 10-foot coiled, detachable cable Replaceable ear cup pads ensure long product life Threaded 1/4-Inch gold-plated adapter included Bayonet clip securely locks detachable cable into ear cup,Impedance: 44 Ohm