DC Inverter CO2 Mig Welder: use VMOS h/f inverter technology, quick and reliable, ... high efficiency, energy saving,durable. DC Inverter CO2 Mig Welder(NBC-270)Model No:NBC-270Technical parameters: 1) Rated Input ... frequency reaches 100KHZ, quick dynamic response;2.Use strong impulse to initiate arc, high arc initiating success rate, stable ... color for Shama brand. DC Inverter CO2 MIG Welder(NBC-270)