Aircraft grade aluminum cable grommets provide superior stability and super-quiet operation. An 8’ cable extension with 3.5 mm stereo plug and 6.3 mm screw-on type adapter expands the boundaries of connectivity. New High Precision Audio (HPA) drivers lead to improved fidelity and audio quality. A re-designed universal headband results in even greater comfort. Features: Type: Dynamic closed type headphones with closed back speakers Passive Attenuation: 33.4 dB Frequency Response: 20-20,000 Hz Fidelity Response: High Precison Audio Drivers: 40 mm, closed back Impedance: 32 ohm Sensitivity: 117 dB at 1 KHz 1 mW Cord: Premium detachable Rated Input Power: 1000 mW Weight: 9.5 oz