... < 2%Reflected Relative Wide Band Noise Current < 10%Output( on Battery )Voltage Range220Vac ± 2%Frequency Range50Hz / 60Hz ± 0.1% (Auto ... DisplayI/P & O/P Voltage, O/P Frequency, Load, Battery VoltageLCD DisplayI/P & O/P Voltage, O/P Frequency, Load ... , Battery Voltage, TemperatureAlarmBuzzer, LED, LCDBattery Under Voltage, Overload, INV. FaultLine ...