About this item 5 pack of 1 foot extension cables 3.5mm (1/8') stereo male to 3.5mm (1/8') stereo female cable For use with most computer speakers, headphones, headsets, microphones, boom boxes, and other portable audio devices Compatible only with headphones that do not feature a microphone and/or controls in the cord Dimensions: 5 x 8 x 1 inches