Rugged and durable, designed for off-board and on-board use. Features intelligent natural convection cooling (no fan) and high energy efficiency. High AC to DC conversion efficiency. Advanced winter storage mode. Advanced microprocessor controller and precise charging algorithms prevent both undercharging and overcharging. Heavy duty sealed aluminum enclosure is resistant to water, dust and other environmental elements. Universal AC input for use anywhere in the world. 2 Year warranty from date of manufacture.