... current feedback control and technology, soft switch DC MMA Welder/Welding Machine(ARC200)1. MOSFET inverter and precision constant current feedback control ... , carbon steel, alloy metal, etc. ;7. Complete accessories: welding torch, welding cable, earth clamp, welding holder.Ø SPEC. Model Spec.ARC-140ARC-160ARC-200ARC ... kg8.2 kg8.5 kg18.5 kg DC MMA Welder/Welding Machine(ARC200)