Harman/Kardon K480NC. Ear coupling: supraaural, Headphone frequency: 11 - 30500 Hz, Headphone sensitivity: 127 dB. Connectivity technology: Wired, Headphone connectivity: 3.5 mm, Cable length: 1 m. Weight: 125 g. Cables included: 3.5mm. Maximum input power: 0.3 W