250A ARC Welder Dual 110V ARC Welding Machine IGBT Welder Inverter Welding Machine Tools 220V Adapter Required. PROMOTOR 250A ARC Welder Dual 110V/220V ARC Welding Machine. Color Mini Welder Set C. Portable welding machine the weight is 4kg/8.81lb, features a easy carrying handle, compact design, easy to carry.