... Welding Machine compact,light and portable automatic protection 110/220V Double Input Welder Inverter DC Argon Welding TIG Welding Machine ... TIG230 Features:1. high-power V-MOS pipe, high rage of power utilization, low no-load loss, good welding quality; ... current, over-voltage protection4. Apply to weld many kinds of steel material, such as carbon steel, stainless, alloy steel, copper, titanium, etc ...