... UPS is displayed clearly on the 5.5 inch LCD screen.Designed for industry to make sure the UPS works well ... wave100% Unbalance loadOperate continuouslyPower factorLaggingTransfer timeZero interruptionShort circuitIntegratedBatteryChager current6-20ADisplayLCDBig screen dot-maxteic display oprating status, menu opertion,voltage, current,parameter ...