With four completely independent, fully automatic microprocessor controlled charging banks you can charge 4 different size batteries at the same time. Up to 6 Amp output per bank and four detachable 6 foot long cables with 75 Amp, color-coded clamps. Separate LED battery status indicators for each bank to keep charging clear. Multi-stage charging algorithm and safe-start, reverse polarity and short circuit protection, the charger will not apply current to the battery clamps until they are properly connected. Overcharge protection is simple; the charger will not over charge the battery. Fan-cooled for dependability and peak performance. The heavy duty steel case is durable and mountable. Charges 6 and 12 volt lead-acid and AGM batteries. UL approved.