Compatible with computers and oterh audio/video devices equipped with a speaker output jack. Centers include four 2924AVPS deluxe stereo headphones, 1214AVPS jack box with both 1/4" and mini jacks and carry case/rack. Volume control on the ear cup, Replaceable, cleanable ear cushions, Adustable headband fits children and adults. Complete center with 2003 polyethylene case.