closed-back, circum-aural headphones for professional monitoring and a wide range of other audio applications: djs, hi-fi enthusiasts etc. # 40 mm driver and high sensitivity neodymium magnet - circum-aural ear pads w/ maximum attenuation of external noise - adjustable, padded headband - high-grade cable materials - impedance: 32 ohms (@1khz) - sensitivity (spl): 102db/ mw (@ max.power) - power handling: 300mw (max.rated) - frequency response: 20 hz to 20,000 hz - cord: 1.2 to 4.0 m/ 4 to 15ft. coiled cable w/ 3.5mm(1/8") Ø gold plated stereo mini-plug - weight: 335 g / 11.8 oz (including cord). - rohs compliant.