Sennheiser HD 300, Headphones, Dynamic, Closed, Circumaural, Foldable, Max. Sound pressure level (1 kHz / 1V RMS): 118 dB, Impedance: 18 Ohm, Frequency range: 18 - 20000 Hz, Total harmonic distortion (1kHz): < 0.5%, Single-ended 1.4 m cable with 3.5 mm angled jack plug, Weight: 182 g