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 speakersPassive Attenuation: 33.4 dB Frequency Response: 20-20,000 HzFidelity Response: High Precison AudioDrivers: 40 mm, closed backImpedance: 32 ohmSensitivity: 117 dB at 1 KHz 1 mWCord: Premium detachableRated Input Power: 1000 mWWeight: 9.5 oz