Superlux HD-330, Headphones, Semi-open, Circumaural, Dynamic, 40 mm driver, Neodymium magnets, Sound pressure level: 96 dB, Frequency range: 10 - 30000 Hz, Impedance: 150 Ohm, Single-sided cable routing, 3 m coiled cable with 3.5 mm stereo jack plug and screwable 6.3 mm adapter, Weight with cable: 324 g, Weight without cable: 244 g