ProMariner ProIsoCharge Battery Isolator 130Amp 2-Alt 4-Bat - 12V 23127. 23127 System Volts DC 12 Max DC Amps 130 Amp Alternator Input2 Battery Outputs 4 Size12.05"(l) x 5.875"(w) x 3.125"(h) Weight7 lbs Significantly Smarter... ProIsoCharge delivers...