【Smart Surge Protector with Digital Display】This upgraded 30A 10800 Joules RV surge protector can display real-time voltage values, display wiring errors through fault codes "E1-E8", and can quickly and automatically disconnect the power supply. 【Full Circuit Analyzer】 This smart surge protector 30 Amp not only detects common wiring faults like open ground or reverse polarity, but also includes voltage and temperature monitoring. This comprehensive protection prevents low or high voltage damage to your appliances and safeguards against circuit burnout. 【Auto Shutoff & Reset】Our RV 30 Amp surge protector offers smart protection by auto shutting off power, similar to a circuit breaker, when it detects faulty power. Once the circuit returns to normal, it auto resets power. Take advantage of this feature to conveniently test appliances for possible overloading 【Safety Features】The Camper Surge Protector is FCC tested and made of V-1 flame-retardant materials, with an IP67 waterproof design and protective cover to safeguard against rain, wind, and sandstorm. 【Simple Plug and Play Solution】 This smart RV surge protector features a user-friendly design. Simple and easy to use, plug and play safely and easily. Portable Surge Protection: The Yomile 30A RV Surge Protector offers 10800 Joules of surge protection and features an adapter circuit analysis instrument to identify faulty power and detect connection errors.