With a lightweight honeycomb aluminum casing and magnesium frame structure, these open-air headphones produce no sense of pressure on the ears, offering a completely natural listening experience. The sound is smooth and relaxed, with deep resonating bass and vocal projection. The self-adjusting wing support automatically adjusts to your head size for easy-wearing listening comfort. A straight cord at the left earpiece terminates to a mini plug with included 1/4" adapter.