Airplane Bluetooth Adapter for Headphones W/ Portable Charging Case Support aptX Low Latency & HD, Universal Wireless Bluetooth Audio Transmitter for Use on Airline or in Gym - 1Mii B05 : Electronics
RHA's Wireless Flight Adapter makes any headphone jack wireless - The Verge
RHA Wireless Flight Adapter Is Great for Travel | GearDiary
Wireless Flight Adapter | Bluetooth 5 Audio Transmitter for Headphones