Beyerdynamic Custom Studio, professional studio headphone, dynamic, closed, impedance 80 Ohms, pressure level 96dB, frequency response 5 - 35.000 Hz, velours ear-pads, weight 290 g, Custom Sound Slider with four different profiles, New variable noise reduction system without batteries, design changeable ( colored covers, rings, earpads and headbands), optionally headset article-nr. 310810, exchangeable cable with 3,5 mm stereo mini jack, incl. adapter to 6,3 mm, coiled cable with up to 3m length, several designs optional at www.beyerdynamic.com.