Stable Output Power The portable welding machine has superior performance, good arc stability, can reduce the damage of copper and iron, improve the working efficiency and reliability of the welding machine, less splash, smooth weld, and achieve perfect welding. Use Safety The hand-held welding machine adopts copper structure and fan inside to increase the output of the main transformer, and has good ventilation effect, so that the welding current is more stable, good stability, no electromagnetic noise, and ensure safety.