... ,phase sequence,power 2.Upload Data:RS232 ETCR 4400 Three Phase Digital Phase Meter Features:Simultaneously ... and current, frequency, phase sequence, active power, reactive power, apparent power, power factor, current vector sum, distinguish transformer wiring ... backlight, battery working continuously for about 16hoursDisplay ModeLCD display, 240dots×160dotsMeter SizeLength, Width, Height:196mm×92mm ...