Encapsulated Transformer with PCB Mount, 230V AC Voltage, EE and EI Cores UL-, GS- and CE-certified Model Number: FB-25V Key Specifications/Special Features:Output voltage: 15 or 25V Primary: 115V, 60Hz Secondary: 4.5V, 220mA Certificates: UL, GS and CE Superior protection at high humidifies Vacuum filled Split bobbin design 50/60Hz Encapsulated Transformer