Sony MDR-XD300 Stereo Headphones Closed-Type Design Movie &amp; Sound Modes 40Mm Driver High-Power Neodymium Magnet 3000 Mw Ear-conscious design for long-lasting listening comfort Sound mode switch to match the source (music and movie) Durable urethane leather construction Features 40 millimeter driver units and long stroke diaphragms Neodymium magnets (360 kJ/m3) for powerful bass and clear treble sounds