Hey yes it is possible - and that is to my surprise! Upon your question I checked online and verified it is BT 5.0, then gave it a try and I was able to connect two sets of JBL headphones to it, and they are working just fine - I can hear the movie dialogues on both sets. I should thank you for allowing to notice this. :)
Apart from that, projector is just brilliant! Auto keystone and auto focus do not work perfect, but it is easy to fine tune - takes 10 seconds.
I paid 840.- few weeks back, and current price (699.- when I am writing this) is also very good compared to before.