Superlux HD-668 B studio headphone, dynamic, semi-opened, 98 db SPL, 56 ohms, 10-30.000 Hz, 300 mW, lenght of the cable 1 m with 3,5 mm stereo jack, incl. adaptor to 6,3 mm stereo-jack, incl. second cable with lenght 3m, weight (without cable): 222 g, self-adjusting headband pads for great fit and maximum comfort, incl. carrying pouch