NMS IF-VC International Dual Voltage & Frequency Travel Converter (50Hz, 220V to 60Hz, 120V) The patented 50W IF-VC automatically converts International Wall Outlet Power Frequencies & Voltages (typically 50Hz, 220V) into the correct 60Hz, 120V power specifications of Corded Electric Shavers. The IF-VC is designed for corded electric shavers, turntables, electric saws, sewing machines, hand power tools, fans, and other small electronic appliances that are designed for use in the United States, Mexico, and Canada.