The Attwood 11901-4 Battery Charger is a dual rated 12 and 6 volt, 6amp/2amp battery charger that is compact and perfect for your shop, bench or garage. This charger can be used for all of your marine, automotive, RV and sports applications. The LED indicators let you know that your battery is fully charged. Overcharge, short circuit, and reverse polarity protection provides years of worry free use.