Lightweight stereo dynamic headphones - ideal for use with personal stereo - driver unit: 30 mm (1" 1/8) diameter - impedance: 32 ohms @1khz - sensitivity (spl): 102 db/mw @ max.power - power handling capacity: 100 mw max. - frequency response: 20 hz – 18 khz @ -3db - cord length: 1.2m (4 ft) long - plug: 1/8" stereo mini-plug (Ø 3,5mm / 0.1 in.) - weight: 50 g (1 3/4 oz.) w/ cord - accessory : one 6.3mm(1/4'') stereo phone plug adapter.