8000 Joules Surge Protection safeguards RV electronics from damaging power spikes. Delivers reliable power conversion and surge protection for worry-free RV adventures. Overload Protection with 15A circuit breaker automatically cuts power and features a reset button. Integrated circuit analyzer checks power source wiring for faults before connecting your RV. Portable design with LED indicator for easy monitoring of power connection status. Built with heavy duty 10 gauge STW pure copper wire and UV-resistant casing for superior outdoor durability 30 to 50 Amp Adapter: A must if you often go camping, it is easy to convert the power at 30 Amp campground to fit for your 50 Amp RV. Its unique color makes it stand out in a tote full of other adapter cords, making it quick to find. CircleCord 30 Amp to 50 Amp RV Surge Protector Adapter Cord with Circuit Breaker and Analyzer, 8000 Joules, NEMA TT-30P Male to 14-50R Female Electrical Power Adapter for RV Camper, ETL Listed