Features: ▲Single phase 220V± 15%. ▲ Powerful IGBT transistor.Digital signal processing,AC/DC,with pulse function. ▲ Multiple welding process for TIG /MMA. ▲ Professional aluminum and stainless steel welding. ▲ High frequency arc ignition. ▲ Superior welding performance and nice welding result. ▲ Wide usage for metal workshops, construction,repair and maintenance.