Ok, thanks. Considering no one here can identify the part and I don’t have the skills to work out exactly what it does, I’ll have to fork out the money. I suspect you are right and it’s just an off the shelf part with a custom code on it to trip up DIYers.

I know enough to know they’re making a fat profit off that module though.

hey mate, I’ve added changed the link to the album. those two both have the HVS004 code on them which you can see in one of the new images