... Low Frequency online,LED/LCD display General (UPS-HB power frequency online HB series UPS) This series runs in online sine wave made ... The computer monitoring is optional.Performanch parameter (UPS-HB power frequency online HB series UPS)lnput voltage220V± 25%lnput frequency50Hz/60Hz± 5 ... )EnvironmentTemperature: 0~40 , relative humidity: 95%(no condensation) UPS Low Frequency online type,single phase