Just plug the adapter to the armrest of the airplane seat, then you can plug your own headphone to the adapter for enjoying the in-flight entertainment system.
PRODUCT FEATURES:
Brand New, Compact and Lightweight
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.
Don't need to use the cheap headphone supplied by the airline
Golden Plated, Better Signal Transfer
Easy to install
SPECIFICATIONS:
Material: Zinc Alloy + Plastic
Color: Black+Gold
Size: 3.5cm x 2.5cm x 1cm
Weight: Approx. 6g
PACKAGE INCLUDED:
1 x 3.5mm Jack Airline Adapter