The Schumacher INC-406A is a fully automatic 6 and 12-volt, 6 amp, 4 independent bank battery charger capable of charging four batteries at once. This unit features independent banks, microprocessors that charge the batteries smarter, four detachable 6' cords with 75 amp color-coded clamps, and a 6 amp output per individual bank. Each bank includes independent LED status indicators that let you know how your battery is doing during the charging process. This unit will provide many years of reliable service.