Lightweight yet strong enough to keep most sound out. Tough yet comfortable. You might even forget you’re wearing these headphones. From the cord to the screw-on adapter to the hassle-free battery-free design everything has been designed to make life in the studio easier on your ears. Specifications - Type: Dynamic closed type headphones with closed back speakers. - Passive Attenuation: 33.4 dB at 8 000 Hz NRR 25 dB. - Frequency Response: 20-20 000 Hz. - Fidelity Response: TruSound tonally accurate. - Drivers: 40 mm closed back. - Impedance: 32 O. - Sensitivity: 107 dB at 1 KHz 1 mW. - Cord: 9 ft (2 750 mm) premium twin-lead cable. - Plug: Straight stereo 1/8? (3.5 mm) gold-plated with screw-on 1/4? (6.3 mm) gold-plated adapter. - Rated Input Power: 500 mW. - Weight: 9.5 oz (includes cable and plug). - Warranty: One year. - Red is Right E-Z channel identifier. - IncrediFlex padded fully adjustable headband. - User-friendly repairability. - Foldable for storage. - Convenient jack adaptor keeper. - Environmentally responsible natural passive isolation – no batteries required. - Made in the USA.