This SPARK 200 Arc welder is based on inverter technology, powered by dc supply, providing TIG weld function when you use. Description:1.Two functions of TIG/MMA,economic and practical.2.Stable performance,automatic voltage compesation capablility.3.Easy for arc starting,stable current,the first choice for thin plate welding.4.Light,compact,easy to operate.FEATURE:1. using high-frequency boost ...