【30 AMP SURGE PROTECTOR FOR RV】Identifies faulty park power plus offers 2100 Joules of surge protector. Protects your RV electrical equipment from dangerous high/low voltage, electrical disturbances, and sudden power surges due to thunderstorms. It can work many times to block surge until a super strong surge beat it!.【WIRING ISSUES CIRCUIT ANALYZER】Allows you to test the quality of your power before connecting your RV, by verifying if the power source is correctly wired and by helping detect most wiring faults. The 30A RV Circuit Analyzer Diagnostic Chart provides fault indication for the following wiring faults: Power ON, Open Ground, Open Neutral, Reverse Polarity, No Power..【ERGONOMIC PULL AND PLUG DESIGN】The RV Surge Protector's plugs are designed with convenient Easy-8-pull Plug Handles. Thanks to the ergonomic handle design, you could easily Plug and Pull Out the 30 amp camper plug from Electrical Box..【SAFE AND RELIABLE POWER】Coming with Increased Receptacle Brass Thickness, the RV 30 Amp Surge Protector can greatly reduce heat. It is worth mentioning that this RV Power Analyzer Adapter is made of Pure PC Material and can withstand high temperatures up to 1382℉..【HIGH-QUALITY MATERIALS】Multiple Full Protection for your devices certified by UL & FCC & RoHS, EyGde 30 amp rv extension cord is fireproof, High-temperature Resistant, more durable, and safe. You could purchase with confidence, with our 30-day return and 36-month replacement.