Headphone HF-20Monitoring Headphone SpecificationsHeadphone specificationDriver diameter: 57mm Impedance: 64Ω Sensitivity: 98dB ± 3dB Frequency response: 20Hz 20KHzCord length: Approx. 4.0m. Plug: 3.5mm . Comfortable with soft earpads . Styled for serious music lovers . Contoured body for superior comfort. PROFESSIONAL HEADPHONES