LCD Display with Green backlightMulti-Voltage: Three Phase 4 Wire & Three Phase3 Wire @ 145-500 VACProtection against Phase loss, Phase Sequence,Phase Asymmetry, Under Voltage, Over Voltage,Neutral Open, Over Frequency and Under FrequencyCan be configured for 3 Phase 3 Wire or 3 Phase4 Wire systemSelectable Over Voltage/ Under Voltage, Asymmetry,Phase Loss, Phase Sequence, Over Frequency/Under Frequency