The Audio-Technica ATH-M20 Closed-Back Dynamic Stereo Monitor Headphones offer exceptional clarity and maximum comfort for hours of listening. The headphones' low-profile, closed-back design provides superior isolation in high-volume listening situations. Features include: 40 mm drivers, each with a neodymium magnet structure; lightweight, adjustable cushioned headband; gold-plated stereo 1/8" (3.5 mm) connector with strain relief and snap-on 1/4" (6.3 mm) adapter; ultra-flexible 10" coiled cable with single-side exit.