... Description AC/DC SQUARE WAVE Welding1.Stable arc, easy to fill in the wire.2.Pedal control for current.3.Compact, low noise.4.DC welding ... for stainless stell, alloy steel, carbon steel, copper and other color metal, AC welding for aliminium.Technical specifications ... -slope time2.5-8 Pastflow time2-10S Remote controlYes Max welding thichness with AC 8mm