Audio-Technica ATH-M20 closed-back headphones feature 40mm drivers with neodymium magnets and copper-clad aluminum wire voice coils for exceptional clarity, rich bass, and extended high-frequency response. The circumaural, closed-back design on these Audio-Technica headphones ensure superior isolation. Lightweight with an adjustable cushioned headband for maximum comfort. 1/8" (3.5 mm) stereo connector and snap-on 1/4" (6.3 mm) adapter. 10' coiled cable with left-side entry.