1. DC arc, DC stick, MMA welding. 2. Simple TIG 3. Memory parameter 4. input voltage +15%~-20% 5. CCC ... control IGBT inverter technology, use microprocessor to control accurately, stable arc by constant current characteristice.2.Control panel compact, soft contact ... parameter, repeat welding parameter and effect.3. Hot start and arc force function, insure enough melting deepness, prevent welding rod ...