This is an AC/DC 318 liters Solar Freezer. It works with battery and regular power. FEATURES : *12VDC with low voltage disconnect for battery protection. *Low Frost System. *Environmentally friendly CFC-FREE refrigerant (R-600a). *Rugged scratch resistant galvanized steel exterior. *Easy to clean aluminum interior. *Automatic control with adjustable thermostat. *12months Warranty.