Professional Quality MMA Arc Welder, Digital Control, Switchable Lift Tig feature. Exceptional Welding performance of all types of Welding Electrodes including Cellulosic. This SifWeld ST180 PRO welding machine adopts the latest pulse width modulation (PWM) technology and insulated gate bipolar transistor (IGBT) inverter technology whilst being portable, small in size, light weight, and with low consumption. The machine has excellent performance in MMA and TIG mode. In MMA mode the following can be controlled: arc starting current arc force and the welding current parameters also can be adjusted separately, the welding mode can select by “welding mode selective switch” the welding parameters can be adjusted by the “selection knob”. This machine has an intelligence protection function inside, such as over-voltage, low-voltage, over-current, low-current. When the machine shows any failures, the alarm pilot light in the front panel will light, it will cut the output current and play the role of self-protection and prolong the service life. Both MMA and TIG mode both display excellent arc characteristics. This welding machine is suitable for all position welding of a wide range of materials including aluminium, stainless steel, carbon steel, alloyed steel, titanium and is ideal for pipework, tool die/mould repair, petrochemical, architectural, car repair, bicycle, handicraft and general fabriction.