Hi,
Thanks for the help. I went and bought this:
It works completely fine, but for anyone reading this, please be aware of the following:
- It will work only in LibreELEC, and it won't work inside Raspbian.
- When you pair your headphones, you must make sure you pair them to the bluetooth adapter and not the builtin bluetooth inside Raspberry.
- Inside Kodi, after you pair your headphones you must change the audio settings as follows:
Inside "System settings", choose "Audio", and in "Audio output device" you must choose "PULSE".
After that, it works perfectly.