1,low frequency online ups 2,IGBT technology 3.,OEM is accepted ... TO AC95%LCD displayDisplay Infostatus display, voltage input/output, frequency, loading,working temperature , DC voltage etc.Status DisplayWorking procedure status displaySound alarmLow ... °C-40°CRelative Humidity10%-90% non-condensingWorking HeightBelow 5000 feet Low-Frequency online UPS 3KVA