This 130 Amp ProMariner Battery Isolator with gold-plated terminals and improved efficiency, provides enhanced charging and gives peace of mind by preventing total discharge of the starter battery. Allows simultaneous charging of three batteries from two alternators, without connecting the batteries together. Endures harsh environments thanks to waterproof design - IP68 rating. Rated for use with DC devices ranging from 10A to 13A. ROHS, CE, Prop65 and ABYC E-11 compliant.