ETR 1000B ‐ DJ Headphone ‐ Blue Driver Unit: 40 mm diameter ‐ Max Power: 3500mW Impedance: 32 Ohms Frequency Response: 20Hz to 20KHz Sensitivity: 108dB (+/3dB) (S.P.L. at 1 KHz) Cord Length: 5 feet/ 1,5 meters