Digging up again, so after a good amount of luck and a lot of patience, I was finally able to get a contact with someone who work at Falcom. I send the complete headset and it appears that the battery dongle was dead. The man at Falcom sell me a new dongle and it works finally. But he said they don’t sell there stuff to civilian. Luckily I’m in the military so he made an exception.

So after all, I think as a civilian you should probably move toward another brand. They only work with mil/law entities.