RV Surge Protector 50 Amp, UL Listed 4100 Joules Waterproof RV Surge Protector with Circuit Analyzer Function, RV Surge Protection with 30 Amp Converter, Must-Have for RV Travel Trailer CamperSurge Protection: Absorbs high voltage spikes, protecting your RV electrical equipment from potential damage. Circuit Analyzer: Equipped with indicator lights to show circuit faults such as open ground and open neutral, providing all around protection against poor and unsafe electrical conditions. An added overheating indicator enhances safety. Durability: UL certified with a rugged pull handle, locking bracket, and tough housing. The product is flame