Designed for use in and out of the studio these mdr-zx300 zx series stereo headphones feature high-quality audio components; pressure-relieving urethane-cushioned earpads for greater comfort and a noise-reducing supra-aural design. Boasting 30mm drivers high-energy neodymium magnets and multi-layer dome diaphragms these headphones pack serious sonic power while a metallic finish adds a little excitement to your listening experience. And with swivel earcups for collapsible convenience while on the go these headphones make a great companion to your ipod or portable mp3 player.multi layer diaphragmsChigh quality large driver units accurately reproduce a broad dynamic frequency range.high energy neodymium driversCefficient neodymium drivers reproduce clear mid-range and low-end sound.pressure relieving earpadsCtake the discomfort out of the equation and enjoy your extended music sessions in comfort.rugged y-type cordCa rugged y-type design makes for a tangle-free experience. Audio driver unit : closed supra-aural dynamic 30 mm dome type (ccaw voice coil) frequency response : 10 - 24 000 hz impedance : 24 ohms at 1 khz sensitivity (db) : 102 db/mw general design : over-the-head monitor diaphragm : pet headband : wide adjustable magnet : neodymium plug : gold-plated l-shaped stereo mini plug type of use : portable home studio hardware cord : 47 1/4 in. (1.2 m) y-type power power handling capacity : 1000 mw weights and measurements cord length (approx.) : 47 1/4 in (1.2 m) weight (approx.) : 4.23 oz (120 g)