Built to fuel your music, these cush Marqii headphones feature 40mm drivers for powerful bass and supreme sound. A padded headband keeps the comfort and an adjustable headband locks in place. Powerful sound; Locking headband; Cush feel; Detachable cord. Ear Cups : Closed, Dynamic (supra-aural); Design : Over-the-head; Plug : Gold-plated L-shaped stereo mini; Cord Length (Approx.) : 3.9 ft.; Weight (Approx.) : 9 oz.; Cord : Connecting cord 3.9 ft (1.2 m); Impedance : 70 ohms at 1 kHz; Sensitivity : 104 dB/mW; Power Handling Capacity : 1000mW; Driver Unit : 40 mm (CCAW Voice Coil), dome type; Frequency Response : 8 - 25,000 Hz