The function of the USD15.12 VA Dual Lamp Economy Edition Latching Relay Self resetting overvoltage and undervoltage protector is as follows:Overvoltage protection, undervoltage protection, automatic reset, equipment maintenance, safety indication, easy installation, strong adaptability.Scientific design avoids crowded wiring productionspace.The inlet port is consistent with the outletport of the leakage protector, facilitating wiringand ensuring flexibility.