Shure SRH1840, open reference recording and high end HiFi Headphone, dynamic, Neodym, 65 ohms rated impedance, 1000mW maximum input, frequency range: 10 - 30.000 Hz, 96dB/V sensitivity, 2,1m removeable jack cable with 3.5mm stereo mini-plug. 1/4" screw-on adapter, weight: 260g (without cable),incl. earpads,case,cable