... 5.Certificate: ISO, SGS, CE 50~10000VA 220V to 110V transformer voltageBLACK CASE STEP UP&DOWN TRANSFORMERDT-100W~10000W STEP UP ... from 110-120 volt to 220-240 volt, single phase transformer voltage.2. Precise input voltage selection according to the country ... Model DT-5000VA electrical power supply step up&down voltage transformer