Power Meter shows single phase and 3-phase current readings on 3-phase units. The display will scroll through each parameter including Current, Voltage, Power and Power Factor. The accuracy measures to within one percent (1%) of the power readings, You will be pleased with the accuracy of this product. The accuracy measures to within one percent (1%) of the power readings. To know more visit our website! Visit Us: http://www.brookspower.com/power-monitor-meter-units.html