THIS CONTROL UNIT WAS PULLED FROM A EXISTING SET UP. THE OWNER OF THE SYSTEM WANTED TO UPGRADE TO A BRAND NEW SALT, CELL AND GENERATOR. Everything is in working order as is when we removed it. The only thing missing would be the flow sensor. You can pick that up on Amazon or at your local Pool supply store for fairly cheap. All that needs to be done. If you look at the first photo one screw is missing, which holds the panel in place. It should have no issues once you plug it in also, this does NOT INCLUDE SALT CELL. This is just a control unit. This is a good price as obviously new aquarite control units will cost an arm and a leg. This is your chance of getting one that’s at a good price that should last you another couple years!