The function of the USD12.32 C45-2042VA rail mounted voltage and current meter External transformer 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.It can display six factors including voltage, current, power, frequency, power factor, and battery level.