Twelve South AirFly
AirFly for Wireless Headphones. Use your AirPods or wireless headphones with any wired headphone jack.
For those moments you need to use your cordless, wireless headphones or earphones with a source that does not emit wireless sounds. E.g. Wired player. Airplane entertainment systems.
Basically a bluetooth transmitter ? 🙂
Accordingly to the web site:
• Allows wireless headphones to connect to wired headphone jacks
• Use to pair AirPods with airline in-flight entertainment systems
• Listen to your health club’s TVs with your wireless sport headphones
• Built-in battery lasts up to 8 hours & recharges via USB
And a video :
Instructions on how to use Twelve South Airfly
Will try it on my next flight… 🙂