... 're looking for the most complete, technologically advanced power protection unit, POLYTEX Power supply is exactly what you need. It ... SwitchYesLED IndicatorsStatus Load level /Battery level,Battery,Utility Power,Inverter,Bypass,Overload,Fault.Audible AlarmBypass Alarm beeps every ... -9 Port RS232 serial interfaceIntelligent slotOptions,Web Power,AS400 or Win Power CMC.Parallel Port Up to three units ...