With auto protection function to prevent over-current and over-heating, it makes the machine safe and reliable. Exact digital current preset, it makes machine easy to operated. Advanced IGBT inverter technology, high working frequency, high efficiency and energy saving. High frequency and high preassure arc striking, 100% arc starting. Advanced air flow control system, able to a save of 30% air compare to traditional machine, which prolongs the using life of air compressor. With self-lock working mode, it reduces the working intensity greatly. With tri-proof design, it ensures working stable and reliable when in kinds of adverse condition. Build in CNC standart connector. Adopting contact or non-contact high-frequency arc striking performance.