Using PWM control technology, constant voltage (CV)and constant current(CC) output control welding current and voltage can be controlled. With auto protection function: to prevent over-current and over-heating, makes the machine safe and reliable. Advanced IGBT (60K) inverter technology, high working frequency, high efficiency, and energy saving. Weld With double closed loop system, arc stability high weld quality, deep bath, and strength small deformation after welding. Soft start and slow arc ending function, no exploding wire, removing tip ball at arc ending. Welding method: MIG/MMSA/Lift TIG, With 2T/4T working mode, convenient operation. The exact digital current/voltage display makes the machine easy to operate. Arc ending data can be adjusted separately, which is easy for operation. With a tri-proof design, it ensures working stability and reliability when in kinds of adverse conditions.