The Shopmate 300 DX single-phase, multi-process welding power source from Miller Electric offers optimal arc performance in CV mode and CC mode. Shopmate 300 offers CV-mode power only. Range is 5 to 400 amps. Arc Control allows users to adjust the weld-bead profile to match the application. Fan-On-Demand reduces noise and airborne particulate matter. Line Voltage Compensation keeps output power constant throughout variations in input power for a more consistent, predictable arc. The welders are covered by Miller's True Blue three-year warranty.