Advanced invert technology,simple circuit,compact,light,highefficiency and energy saving. Strong power line compensateability,anti-power supply fluctuation,steady weldingcurrent,reliable performance. Small DC arc welder uses scale trusttechnology,single knob adjustment,easy operation. No load loss lessthan 100W, compared with traditional welder,energy saving up to50%. Invert frequency up to 100KHZ, high speed of dynamicresponse,easy arc starting,steady arc,anti interference,lownoise,small splash,deep welding pool,good quality. suit for lowcarbon steel,mid carbon steel and alloy steel,all ferrous metal canget good quality welding seam, widely used for oilpipeline,petrochemical,car,shipbuilding,bioler,nuclearelectricity,space flight,war industry,bridge building and outdoorworking.