Stereo Headphones Driver unit: 40 mm Impedance: 32 O +/- 10 % Frequency range: 20 Hz – 20 kHz Sensitivity: 100 dB +/- 3 dB /1 mW (S.P.L at 1 KHz) Detachable Cable: 1,2 m 5 % Plug: 3,5 mm Weight : 189 g