Convert audio jack from airplane dual socket to a standard 3.5mm (1/8 inch) audio jack
Allow using your own 3.5mm audio jack headphone to enjoy airplane radio, movies, etc. and don't need to use the cheap headphone supplied by the airline
Easy to install. Just plug the adaper to the armrest of the aeroplane seat, then you can plug your own headphone to the adapter for enjoying the in-flight entertainment system