... low noise stable welding arc,wonderful welding shape,energy-saving,lightness,minimizing 1.It adopt MOSFET/IGBT inverter technology,high frequency arc start design2. ... the traditional welder 4.It is easily arc,small flash,low noise stable welding arc,wonderful welding shape5.Being able to continue running stably ... Fact:0.93Efficiency:85%Insulation Class:BProtection Class:IP21 DC INVERTER WELDING MACHINE