The Thor Converter powers devices up to 100 W. Thor converts Voltage and Frequency. Select the frequency (50 Hz or 60 Hz) from the front panel then select voltage 115 VAC or 230 VAC and plug it in. Thor also reconstructs the mains power line providing clean, isolated power. The Thor operates worldwide, with its universal output receptacle. Made in the USA with quiet, Amgis toroidal transformers, the Thor is rugged, reliable and economical. The Thor converter includes a universal medical grade, safety certified wall adapter, grounding wire and instructions.