The kit includes an electronic brain. Since I was putting it in a flatfender that would almost never have a top, I was worried about water. Flaming River tells me the thing isn’t submergible. I told them I was going to hide it up under the dash, and while it might see spray from time to time, going underwater wasn’t that likely. The company suggested that I try to seal it better if it was going to get fully submerged, but that it might take an occasional dunking. Since the place under the dash where it is going to be mounted is higher than the engine intake, I’m not going to worry about it too much. All the wiring that’s needed is included, too.