... isolation, Anti-Vibration.Performance CharacteristicsHigh-precision measure three-phase voltage,three-phase current,active power,reactive power ,apparent ... Signal InputMode of connectionsingle-phase ,three-phase three-wire,three-phase four-wireRated voltageAC57.7V ,AC 100V,AC220V,AC380VRated currentAC1A ... wiring diagram 96*96 SINGLE-PHASE THREE ROW AC VOLTAGE FREQUENCY LED DIGITAL COMBINATION METER ...