... /220V 2,OUTPUT:110V/220V 3,LCD/LED DISPLAY UPS,high frequency led/lcd upsKey FeaturesTrue on-line double conversion technology with ... Power, Inverter, Bypass, Overload, FaultAudible AlarmBypass, On battery mode, Battery low, Overload, FaultAcoustic NoiseAt 1 meter distance45 dBA50 dBACommunicationsDB-9 PortRS ...