Urbanears - Plattan was designed to be the perfect classic headphone, with all the additional features that take it above and beyond the ordinary. It"s a full-size headphone allowing for rich, secluded sound in a compact body. You can fold it down to the size of your fist for maximum mobility. Plattan also comes with a ZoundPlug on the earcap, allowing a friend to plug in and enjoy your music. 3.5mm stereo plug compatible with any music players using 3.5 mm standard120cm / 47" tangle resistant fabric cordWith ZoundPlug technology socket that allows your friend to plug into your ear cap and listen to the same thing as you are listening toCompatible with unprotected 3.5 mm standard such as iPhone, Mustardberry, HTC and moreCollapsible features for easy storage and portability Technical Specifications:40 mm handmade driversFrequency Response 20Hz-20kHzImpedance 60ohmSensitivity 115dBMax Input Power 40mW