... port 4.Optional SNMP card Key Features1.Single phase in, single phase out2.Microprocessor control3.True on-line double conversion ... Input Voltage Range220V or 110V+-20% Frequency50/60Hz±5% PhaseSingle phase + GND Output Voltage Range220VAC ±1% or 110VAC ±1% ... state, temperature LEDMain input , bypass,Inverter,Battery,Over load,Fault Efficiency Whole unit85% Communication1.Power status 2.UPS shutdown ...