I want to bring the right audio adapter so I can use my own headphones and attach them/plug in to seat console. I'm flying in coach on a 763 to Hawaii (from LAX).

What audio connectors does United use? 1-prong or 2-prong? 2.5mm? 3.5mm? 6.3mm? or................?

Thanks for your help!


Sorry again if this was wrong place to post this question.