With an auto protection function to prevent over-current and over-heating, it makes the machine safe and reliable. The exact digital current preset makes the machine easy to operate. Advanced IGBT inverter technology, high working frequency, high efficiency, and energy saving. High frequency and high-pressure arc striking, 100% arc starting. An advanced airflow control system is able to save 30% air compared to traditional machines, which prolongs the life of the air compressor. With self-lock working mode, it reduces the working intensity greatly. With a tri-proof design, it ensures working stability and reliability when in kinds of adverse conditions. Build in an air compressor. Adopting contact or non-contact high-frequency arc striking performance.