Shure SRH1540, Headphones, Closed-back, Circumaural, Dynamic, 40 mm driver with neodymium magnet, Impedance: 46 Ohm, SPL: 99 dB, Max. input level: 1000 mW, Frequency response: 5 - 25000 Hz, Gold-plated 3.5 mm stereo plug connector, Dual-sided, detachable 1.8 m cable, Weight with cable: 329 g, Weight without cable: 292 g, Incl. spare alcantara ear pads, gold-plated screw adapter and travel box