the t.bone HD 990D stereo closed back dynamic headphone, impedance 35 Ohm, sensitivity 105 dB, frequency response 10-20.000 Hz, cable lenght 1-4m, coiled connecting cable, isolation from ambient noise (22 dBA), weight 260g, angled jack plug 3,5mm, 6.3 mm jack plug screwable, recommendable for drummers