Sevenstar ST-100 Step Up/Step Down Transformer (100W) ST-100 U/D
Step-up Transformer: Advantages and Disadvantages - EVR Power
Amazon.com: Simran AC-5000 Step Up/Down Voltage Transformer Power Converter for Conversion Between 110 Volt and 220 Volts with Circuit Breaker, CE Certified, 5000 Watts, Black : Electronics