The guys mentioned this in episode 6. What an amazing thing to have while traveling on today's airlines. Easily use your wireless headphone, like AirPods instead of the horrible airline earbuds. 

Check them out here on Amazon

Wish you could watch in-flight movies with your AirPods or noise cancelling headphones? Have only one device to stream but 2 people who want to watch? AirFly Pro is a tiny Bluetooth device that connects up to 2 AirPods /wireless headphones to any single audio jack and transmits/receives audio wirelessly wherever you go.