GEARGO
A surge protector sits between the campground power post and your RV and is meant to guard the RV's wiring and appliances from power problems at the site. If you never plug into shore power (for example you run only on batteries or a generator), you may not need one.
RV and trailer owners who plug into campground power.
It names a warranty of 3-year. Check the listing for the terms.
GEARGO RV Surge Protectors 50 Amp, 15000 Joules RV Circuit Analyzer, IP68 Surge Voltage Protection, RV Adapter Plug for Camper (Orange) (ASIN B0D53RLC1Q). Amazon's page has the current price, specs and reviews.
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Check current Amazon listing (ASIN B0D53RLC1Q).
Fine print: The Dude has not personally tested this product. The details on this page come from the Amazon listing and can change; check the listing for the current specs, price and availability.