You are bidding on an antenna rotator controller for Ham or amateur radio operators. This particular controller is the Yaesu G-800S. I just recently acquired this and don't have the history on it. I know it was pointed to the south direction and when I turned it on, it corrected to due north. Other than that, I don't know more about this and this has not been fully tested. I was told it works - but, I can only sell this AS IS. 

Any questions, please ask.

Happy Bidding!!