Urbanears Plattan Black Hifi-Headphone, Zound Plug-Function (this allows another pair of Headphones to be plugged into one of the ear pieces by using a 3,5 mm plug so a second person can listen in), on-ear-design, semi-open, foldable, 40 mm drivers, 60 ohms rated impedance, 115 dB efficiency, frequency response: 20 - 20000 Hz, 1,2 m tangle resistant fabric cable with 3,5 mm plug, microphone and remote-control, color: black