Adopt advanced IGBT inverter technology,high effective and energy saving,stable welding current,low welding spatter,portable&compact. Over voltage,over current thermostatic protection ,applicable for maitenance and family repairing,farm and automotive etc. AC220V 50Hz input, 35% duty cycle,4.0 Kva capacity,125 amp max welding thickness,suitable for 1.6-3.2mm welding rod,only 4.3 kgs.