Shure SRH1540 premium headphone - dynamic, closed-back and over-ear design, 40 mm Neodym-Magnet, 46 ohms impedance, sensitivity: 99 dB, frequency range: 5 - 25000 Hz, 1000 mW maximum input power, gold-plated 3,5 mm plug, double sided, removable, 1,8 m cable, weight: 286 g (not including cable), incl. extra Alcantara-Ear-Pads, screwable 6,3 mm adapter and box