Digital Reference Headphones. Closed ear-cup compfort design. NEW High performance 40mm drivers with super bass dynamic sound. DJ professional styling and large comfortable earpads for extended listening periods and reduced external sound interference. Powerful NeoDynium drivers. Individual volume controls. Superior listening phones! 3.5mm plug. 6.35mm adaptor. 20Hz-20KHz 117dB 32 ohm. 1.5M cord.