Beyerdynamic Amiron Home Tesla Over-Ear Headphones - Black Type: Earbud Frequency Response: 5Hz-40KHz THD: Input Impedance: 250 ohms Power Supply: Nominal power handling capacity: 200 mW Sensitivity: 102 dB +/- 3 dB at 1 kHz Cord Length: 9.84 ft. Weight: 2.00