... 2.Upload Data:RS232 ETCR 4400 Three Phase Digital Phase Meter Features:Simultaneously measure three-phase AC voltage, current, phase ... backlight, battery working continuously for about 16hoursDisplay ModeLCD display, 240dots×160dotsMeter SizeLength, Width, Height:196mm×92mm× ... pc; Certification: 1 pc. .Field Application ETCR4400 Three Phase Digital Phase Meter ----Manufactory, RS232 interface