【30AMP TO 50AMP RV ADAPTER】30 Amp NEMA (TT-30P) male to 50 Amp NEMA (14-50R) female adapter for convenient power connection to your 50 Amp RV at the campground. 【8000 JOULES SURGE PROTECTION FOR RV】Kohree 30/50 amp surge protector for camper absorbs high voltage spikes within 1 ns. It safeguards your RV's electrical gear against hazardous voltage fluctuations, electrical disruptions, and abrupt power spikes resulting from thunderstorms. 【CIRCUIT ANALYZER WITH LED INDICATORS】Effective way to verify whether the power source is wired correctly and to detect most wiring faults. Diagnostic LEDs on trailer surge protector provide fault indication: Correct Wiring, Open Ground, Reverse Polarity, Open Hot, Open Neutral, Hot/Ground Reverse, Hot on Neutral with Hot Open. 【EASY & SAFE TO USE】The RV power adapter plug is designed with an ergonomic grip handle for safe and effortless plugging and unplugging. 【HIGH QUALITY MATERIALS】Made up of high quality pure copper and heavy duty PVC, Kohree 30 amp to 50 amp RV adapter is fireproof, high-temperature resistant and identifies faulty power, ensuring RVs, campers' safety. Kohree 30 Amp to 50 Amp RV Adapter, 8000 Joules Electrical Power Adapter with Surge Protector