6 Amp fully automatic battery charger. Microprocessor controlled automatically adjusts the amperage rate to charge & maintain. Multi-state charging for added precision, safety & battery life. Float-Mode Monitoring automatically maintains optimum battery charge. Charges compatible battery types standard & AGM. Reverse hook-up protection - charger will not operate if clamps are reversed. Auto voltage detection - automatically detects 6 or 12 volt batteries. SCHU ECO ENERGY meets the highest industry standards for energy efficiency. Heavy-duty steel case.