Originally Posted by gtrainer64

I want to purchase a Panasonic headphone for an international flight I'm looking to take shortly on United Airlines. I've heard others say that typically a standard airline adapter has 2 pins of equal size but on United Airlines, you seem to need an adapter where the 2 pins are different sizes. I saw somewhere somebody mentioning 2 pins where one is basically smaller than the other. Can anybody let me know what headphone adapter pin works on United flights, if any?

Thank you.