1.For MMA welding in alternating current(ac) and direct current. 2.Used with a wide range of electrodes, rutiles, basic, ... etc. 1.For MMA welding in alternating current(ac) and direct current.2.Used with a wide range of electrodes, rutiles ... thermal protection wooden case.3. Moving coil type transformer,stepless current adjustment. ZXE1-315 ARC Welding Machine