... OEM service offered Feature:*IGBT/SPWM,small volume,lower noise,high reliability*double isolation of the input and output ,safe ... 0.01%THD:≤2%Input voltage:220V±20%Output voltage:115V±20%Reactime:≤2msDigital meter indication:Frequency,voltage,current,power and power factor ... warning devicescooling system:Forced fan cooling 3KVA 400HZ frequency and voltage regulator high voltage power supply