Use the Airline adapter to connect your own headphones to the in-flight entertainment system on the airplane for listening to music and moviesnThe airline adapters converts a standard headphone stereo mini plug (1/8u0026#34;, 3.5mm) to a dual-prong airline jacknMost of the headphones (portable, noise cancelling) are equipped with the 1/8u0026#34; plug that will fit this adapternThis adapter is designed with a smaller rounded u0026#34;baseu0026#34; to fit with All 2-prong airline jack. (Some adapters doesnu0026#39;t and will not fit everywhere)nPlease note! Some newer airplane types accept the standard headphone plug direct, with no need for the adapter. There is a rarely used 3-prong jack that doesnu0026#39;t fit the adapter. Buying the airline adapter you are covered in the most casesn