HydroQuip Control System CS9700B-U-ML700-4.0 EL2000 Series includes the longer ML550 Control Panel (second photo)
This control system is part of the EL2000 series.
Includes a ML550 spaside control panel.
Featuring a 4.0kW heater.
Balboa EL2000 Control System CS9700B-U-ML550-4.0 ML550 Topside