【15000 Joules】GEARGO Upgraded RV Surge Protectors protects your RV by recognizing power failures and provides up to 15000 joules of surge protection. It protects your RV from high/low voltage and weather-related power surges. | 【50AMP RV Circuit Analyzer】 Using a surge protectors before connecting the RV will verify that the power is wired correctly and that there are no problems with the power supply, and will also help detect most wiring fault problems. The surge protectors will show these causes of faults: correct wiring, open ground, open neutral, reverse polarity, reverse heat/ground, and no power | 【Safe and Reliable】 Flame-retardant materials, and IP68 waterproofing make the surge protectors weatherproof, and the rugged enclosure reduces the risk of fires caused by circuit problems | 【Easy to use】The plugs use ergonomic principles, the use of right-angle male plugs to achieve easy plugging and unplugging, the connection between the power supply and the interface is more convenient | 【3-Year Warranty】 Geargo are committed to ensuring our customer experience by providing high-quality product and customer service. We have great confidence in our products and our three-year warranty is our sincerity! If you are not sure whether this is a 30A or 50A surge protectors, please let us know!