Audio-Technica Airtight Dynamic Monitor Stereo Headphones (Discontinued by Manufacturer) Self-adjusting lightweight headband for long-wearing listening comfort 40 mm drivers with neodymium magnets and copper-clad aluminum wire voice coils Circumaural design ensures superior isolation Rotating earpieces for easy one-ear monitoring Gold-plated 1/8" (3.5 mm) stereo connector and snap-on 1/4" (6.3 mm) adapter