Both 6 volt and 12 volt battery charging capability at 6 amp rate, Built in self-resetting circuit breaker to protect, against short circuits, Heavy-duty cables and copper clamps are, corrosion-resistant for better connections, Connect to side or top-mount battery terminals, Rugged steel case with baked-on finish, plus sturdy handle, Analog meter readout, Reverse polarity protection, Short circuit protection, UL Listed SKU: APS831