Portable Surge Protection: The GEARGO 50A RV Surge Protector offers 9500 Joules of surge protection and features an adapter circuit analysis instrument to identify faulty power and detect connection errors. | Circuit Analyzer: Prior to connecting your RV, use the 50A RV Circuit Analyzer Diagnostic Chart to test the quality of your power and identify most wiring faults, including Correct Wiring, Open Ground, Open Neutral, Reverse Polarity, hot/Ground Reversed, and No Power. | Safety Features: The GEARGO RV Surge Protector is UL & FCC tested and made of V-1 flame-retardant materials, with an IP68 waterproof design and protective cover to safeguard against rain, wind, and sandstorm. | User-Friendly Design: The RV Surge Protector is designed for ease-of-use, with ergonomic power grip handles for safe and easy plug-and-unplug, and a right-angle male connector to minimize damage to your power source. | 3-Year Warranty: GEARGO aim is to provide HIGH-QUALITY PRODUCT & COMPLAINT-FREE CUSTOMER SERVI