Type: Monitor Headphone Driver Unit: 40mm Frequency Response: 18Hz-22KHz Input Impedance: 40 ohms Sensitivity: 104 dB/mW Cord Length: 9.84 ft. (3 m) Weight: 8.1 oz. (230 g) Features: 40 mm drivers for smooth low-end response and high-end clarity Copper-clad aluminum wire (CCAW) voice coil delivers extended high frequency range and cleaner bass Adjustable double headband for long-wearing comfort Specially designed support system reduces pressure for extended listening comfort Plush over-the-ear earpads minimize sound leakage 500 mW Maximum Input Power