ATGFOX RV Surge Protector 50 Amp50 Amp RV Surge ProtectorIdentifies faulty shutdown power and provides a 4100 joule surge protector. Protect your RV electrical equipment from dangerous high low voltages, electrical disturbances and sudden power surges caused by thunderstorms. Circuit AnalyzerWith fault identification indicator. You can judge the faulty power by the indicator light, so as to avoid the damage to the RV electronics. It detects the most common wiring faults such as open