What controller is this?

I received a call for tomorrow to check out a FPB (or more) and was sent a pic of this controller that they are connected to. I've never encountered them and would like to get somewhat familiar with it before I head out there. Anyone know who makes them or have any documentation on it? It'd be greatly appreciated



Looks like a service light is on, although there are two LEDs there so I can't really tell what that is.

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