Advanced inverter technology, high frequency, high working efficiency and energy saving. Using PWM control technology and constant current output control, welding current arc force current can be exactly adjusted and controlled. With an auto protection function to prevent over-current and over-heating, it makes the machine safe and reliable. Excellent arc characteristics, good welding performance, and little spatter. Under longer welding cables, this machine can weld. With a three-proof design, it ensures working stability and reliability when in kinds of adverse circumstances. Portable and lightweight, it can be moved easily and energy saving up to 20%. Able to work all kinds of metal, for example, carbon steel, alloy steel, cast iron as well as stainless steel, etc.