... *Small in size, light in weight, little noise. *Can use AC function to weld stainless steel, carbon steel, alloy steel, copper ... , ect metal, use DC function to weld aluminium, and aluminium alloy.Input power Voltage ... blow time:2-10S Remote system interface: No welding thickness: (AC) 3mmOEM, ODM is also supplied. Inverter AC/DC TIG 200 welding machine