Mosfet technology, the core adopts advanced Mosfet inverter device. •Arc-Force for Anti-Sticking •Hot-Start to start the Welding Arc Smoothly •With Advanced Single IGBT Technology Specifications Rated Input Voltage(V): AC220V±15% 1P Rated Input Current(A): 54.5 Input Frequency(HZ): 50/60 Current Range(A): 40-300(220V) Duty cycle at maximum current: 60% Efficiency(%): 80 Power Factor: 0.73 Protection Grade: IP21 Weight(kg): 17.5 Electrode Diameter(mm): 2.5-4 Dimension(mm): 500x203x375 Standard Accessories: •ARC Holder With Cable •Earth Clamp With Cable Picture is for reference only. The actual item may vary.