These Beyerdynamic DT-770 Pro Headphones are a studio headphone, dynamic, closed, impedance 250 Ohms, pressure level 96dB/SPL, frequency response 5-30.000 Hz, diffusfeldentzerrt, weight 270g thomann incl. cable, 3,5mm stereo jack with adapter 6.3mm and bag, cable lenght 3m, coiled cable.