Safeguard your RV's electrical system with this advanced surge protector. Designed to shield your valuable appliances and equipment from damaging power surges and spikes, this protector meticulously examines the power source before connection, guaranteeing a secure and dependable power supply. Featuring a 50A RV Circuit Analyzer Diagnostic Chart, this unit accurately identifies potential wiring faults, including correct wiring, open ground, open neutral, missing L1, missing L2, reverse polarity, L1 Ground Reversed, L2 Ground Reversed, and open circuit/no power. With a 50A / 125V/250V, 50Hz rating and plug type of 50-Amp male (NEMA 14-50P) / 50-Amp female (NEMA 14-50R), this surge protector offers superior protection for your RV's electronics. Equipped with 4200J surge protection and ETL certification, you can confidently rely on this product to safeguard your RV's electrical system and provide peace of mind during your travels.