Features: Small, light, compact and portable compared to large bulky conventional welding machines. Easy to starts arc non-stick electrode. Intelligent one-click adjustment. Adopts IGBT module technology, energy-saving and stable heat dissipation. High duty cycle, lower cost operation, higher output. Fine-quality shells design, waterproof, overheat-protection, overcurrent-protection, overload-protection and insulation-protection. Household 220V, high efficiency and energy saving. Digital LED display when use, with the knob control, which makes it fast, safe, simple and stable. With a humanized design USB port, which can be used with fan, night light, speaker and also can be used to recharge your phone. It can be used to welding 2.5mm/3.2mm welding-rod, square-pipe, galvanized-pipe, angle iron, stainless steel.