Superlux HD-681 B studio headphone, dynamic, semi-opened, 98 db SPL, 32 ohms, 10-30.000 Hz, 300 mW, lenght of the cable 2,5 m, 3,5 mm stereo jack, incl. adaptor to 6,3 mm stereo-jack, weight (without cable): 276 g, incl. carrying pouch, self-adjusting headband for great fit and maximum comfort