IGBT single tube Inverter DC ARC Welder,140 amp ,High duty cycle ,stable arc,energy saving,economical INVERTER TECHNOLOGY OEM A. Function and features1. ... a maximum way2. Adopted advanced full-bridge inverter technology of module 3. Easy for arc starting, little spatter, excellent welding performance ... One Year Warranty. 3. Technical Support. 4. CCC certificate ARC-160I IGBT Inverter DC ARC Welder