"Factory-installed option allows units to be used when running a generator or in marine applications when connected to shore power. Allows appliances to run on 110/230V AC current when available and automatically switch back to 12/24V DC power when AC current is not available. Option must be ordered at time of refrigerator/freezer purchase call for details. U.S.A. Works With SunDanzer refrigerators/freezers, Style AC/DC option."
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