... 4.CE,CB,CQC,ROHS approval 5.OEM/ODM PCT 500-1500 Line-Interactive UPSMain Features1.CPU control 2. ... Overload10.Beeping Selection ProductRequirementsModel 1Model 2Model 3Model 4Model 5Power (VA)PCT-500PCT-650PCT-1000PCT-1500PCT-2000InputVoltage145-290VACĀ±5VFrequency50Hz+/-10%OutputVoltage ( ... following the realBeepingDuring the battery mode ,the beeping optional PCT 500-1500 Line-Interactive UPS