... Zero transfer time Protection against all type of power problems Self test while start of the UPS Site ... load dischargeBypass Automatic Transferon overload and UPS failureBefore UPS Power-onDefault NO, user adjustable to YESVoltage Range80~264VAC ... vice versaLED IndicatorsStatusLoad level / Battery level, Battery , Utility Power, Inverter, Bypass, Overload, FaultAudible AlarmBypass, On battery mode, ...