Once you cast off, you deserve all the comforts of home and the large capacity of the Kool Kaddy makes it the perfect host for the entire family.Load the cooler the night before and operate it from the optional AC Adapter. On the way to the dock, plug it into your vehicle cigarette lighter. On board...use the lighter socket or an auxiliary battery!The large capacity is ideal for long trips, big families and tailgate parties. Consider this Koolatron for your next vacation! With a brushless motor and internal circulation, it can be used horizontally or vertically like a fridge.