Technology: Classic series, EI transformer, Relay type Input Voltage: 140Vac~260Vac Input Frequency: 50/60Hz Output Voltage: 220Vac Output Accuracy: +/-8% Efficiency: 98% Phase: Single phase Display: Input and output voltage meter display Protection: High voltage protection Low voltage protection High temperature protection Circuit protection: Circuit breaker Smart Cooling System: No Operating Temperature: 0~40ºCordm;Cordm;C Storage Temperature: -15ºC~45ºCC~45ºCrdm;CC~45ºC Operating Relative Humidity: 10%RH~102%RH, Non-condensing