Using PMW control technology, constant voltage (CV), constant current (CC), output control, and welding current & voltage can be exactly controlled. Built-in polarity converter: suitable for Wire Welding for flux (no gas) and MIG/MAG (gas) Welding With auto protection function: to prevent over-current and over-heating, makes the machine safe and reliable. Advanced inverter technology: high working frequency, high efficiency & energy saving. With double closed loop system: arc stability Welding method: MIG/MAG and Lift TIG welding, using 2T/4T working mode, easy to operate. short circuit transfer waveform control: stable welding with little splashing. With a tri-proof design, ensure stability and reliability in adverse circumstances.