... shape,energy-saving,lightness,minimizing 1.It adopt MOSFET/IGBT inverter technology,high frequency arc start design2.It can balance automatic ... effciency,small unload loss,save 40% energy than the traditional welder 4.It is easily arc,small flash,low noise stable ... %Power Fact:0.93Efficiency:85%Insulation Class:BProtection Class:IP21 DC INVERTER WELDING MACHINE