Weldpro TIGACDC200GD Digital AC/DC TIG Welder 200 Amp with Pulse CK17 Worldwide Superflex Torch with Trigger Switch Dual Voltage 220V/110V L12003 NewThe WeldproTIGACDC200GD welder is an inverter based machine that utilizes the most advanced inverter technology. IGBT circuits along with PWM technology, along with the greatly reduced size and weight, enable this welder to not only be more efficient by 30%, but also as a result of the electronic circuitry, enables this ac dc tig welding machine to afford the user far more and better range of settings for each specific weld.