This airline adapter takes the two-port stereo headphone port commonly found on airplanes and converts it for use with a regular 3.5MM pair of headphones.Use your own set of headphones on a plane; instead of the provided in-flight set.The airline adapter converts a regular headphone stereo jack 1/8' (3.5mm) to a dual prong 1/8' (3.5mm) airline jack.Allow using your own 3.5mm audio jack headphone to enjoy the onbroad radio, movies...etc.Fits all standard airline connectors and headphone stereo jacks.Easy to use, just connect this adapter with your headphone and the audio jack in your aircraft seat.Gold-plated contacts,Airplane Airlines 3.5Mm Headphone Jack Adapter Converter Connector.Pocket-sized portablility,Easy to use: Plug-and-play.Note: Some newer airlines accept the standard 3.5mm headphone jack, with no need for this adapter.