... RS232 communication port 6KVA & 10KVA have ECO function UPS management software (optional) External SNMP or USB or ... SNMP, MBS are optional)DisplayLED indicates the status of UPS (LCD is optional)LCD & LED displayAlarmLow battery, abnormal ... AC input, UPS failureProtectionLow battery, overload, short-circuit and over temperatureNoise (dB ...