The electrical qualities of this unit are irrelevant, as its build quality is so poor that you're likely to break it during installation. The use of screw terminals was a bad design choice, as most users of this device are going to need to splice into something and will need wire leads. I ended up cutting and stripping several 9-inch leads out of the blue "remote turn on" wire that comes with amp kits. Unfortunately this was for naught as the screw terminals are extremely easy to strip and there appeared to be no amount of torquing that was enough to hold the wires but that did not strip the block. If you are going to use this unit, expect that you may need to solder your leads onto the terminal block.I ended up picking up aPAC SOEM-4which did the job. It was a little bit bigger, but had built-in leads.