I am afraid I do not know much about this unit. It powers up and looks OK, but I have not reset to factory defaults.
It looks like it was prosed form the wall at some stage, so the rear bracket holes are a little bent, but there is no damage to the unit itself. Nothing a few washers wouldn't fix.
By all means ask me about the condition, but apart from it boots up and displays the correct time and when I press a key it prompts for identify, I can't help you any on the operation or use.