Originally Posted by zinger60
Would that be something that would have come with the camper when new because there is no sign of the unit anywhere in the camper, just the bracket outside the door.
I can't imagine it ever coming with an RV. I am pretty sure you could by the sending unit and mount separate. My guess would be that the bracket was left behind by whoever mounted it. That would prevent having to fill the hole in the sidewall. Also, you don't have to mount the sending unit to use it. It can be set anywhere and it will send a signal to the base station.