Type: Dynamic closed type headphones with closed back speakers Passive Attenuation: 36.7 Db Frequency Response: 20-20,000 Hz Fidelity Response: High Precision Audio (HPA) Drivers: 40 mm, closed back Impedance: 32 ohm Sensitivity: 114 dB at 1 KHz 1 mW Cord: Premium detachable Rated Input Power: 1000 mW Weight: 11.5 oz Warranty: One year Red is Right E-Z channel identifier Universal padded, fully adjustable headband User-friendly repairability Foldable for storage Environmentally responsible natural passive isolation – no batteries required Made in the USA