Phiaton Fusion MS 430 M-Series Carbon Fiber Headphones with Mic Type: Headphone Driver Unit: 40mm Frequency Response: 20Hz–20KHz THD: Less than 1% at 1 kHz Input Impedance: 16 ohms Power Supply: Maximum Input Power: 1,000 mW Sensitivity: 99dB S.P.L. at 1KHz Cord Length: Cord Length: 3.94 ft / 1.2 m