... and Features of the welding machine 1) IGBT inverter technology,energy saving, power frequency, no noise. 2)Cleear digital meter ... effect! 4)Over current ,Over heat,Over load,Over voltage protection 5)Special apperance, wire feeder intergrated ,protable 6 ... hammer,protective mask The parameter of the welding machineITEMUNITMIG250MIG280MIG315Input power VoltageV 380V 380V 380V FrequencyHZ 50/60 50/60 ...