... FormPure Sine Wave(both in AC and Battery mode)Power factor0.7Charge Current≤15 AmpTransfermer Time≤4msAC protection8A FuseCircuit ... BreakerDC ProtectionFuseLCD/LED IndicatorsLoad level / Battery level, Battery , Utility Power, Output, Bypass, Overload, Fault/BuzzerLCD/LED contentBattery capacity. Mute. ... and overload protection8. Heavy Duty CPU control standard backup UPS 500va 300w