Welding Machine Advantages: All the key parts like IGBT module, fast recovery diode, integrated circuit, relay and current & voltage adjustor are world famous brand which have high reliability; Soft switch technology, high efficiency & energy-saving, 100% duty cycle. Good dynamic characteristic, stable arc, nice weld appearance, low spatter. Multi-characteristic and usage power source, excellent stick welding characteristic, model 630 can be used for carbon air gouging. Welding mask and Safety mask