When flying, I usually use a Bluetooth headset to listen to videos on my tablet.

I would like to listen to the in-flight entertainment sometimes as well.

Is there such a thing as a Bluetooth headset that also has a jack input, that can be used for Bluetooth or plugging into an audio source?

Yes, I know there are devices that allow you to use a Bluetooth headset with a plug in jack, but that's an extra device and complication.

Does such a thing exist?