The adapter adapts 20AMP circuit you have on camper to 15AMP when needed. It rated at 15AMP/20AMP 125Volt. Adapt household Nema 5-15P standard outlet to any devices that has a Nema 5-20 Power cord.
ALITOVE DC 12V 5A Power Supply Adapter Converter
Manufacturer : ALITOVE. Input: 100V-240V 50/60Hz; Output: DC 12V 5A max; Output adaptor jack size: 5.5mm x 2.5mm,compatible with 5.5mm x 2.1mm. Indoor use only! It will protect your electronic products from destruction.