ARC-140 is a rectifier adopting the most advanced inverter technology. welding power source can offer stronger, more concentrated and more stable arc. when stick and work piece get short, its response will be quicker. Specifications: Type: Stick Arc DC Inverter Welder, Supply Power: 110/120-Volt, 50/60Hz. Rated Input Power: 110-Volt/39 Amp, Current Range: 20-140 Amp, Rated Duty Cycle @ 104F(40c): 60% @ 140 Amp, Nominal DC Open Circuit Voltage: 65-Volt, Output Voltage: 25.6-Volt, Usable Electrode: 1/16 in. - 3/16 in. Power Factor: 0.93, Dimension: 12.8 x 5.1 x 9.8 in. Net Weight: 7.7 lbs. Packaging Size: 16.0 x 9.0 x 12.0 in. Packaging Weight: 13 lbs. Packing List: ARC-140 Stick Arc Welding Machine, 7 Feet Power Cord, 10 Feet 200 Amp Electrode Holder Assembly, 10 Feet 200 Amp Work Clamp Assembly, 2 Pieces Electrode of 1/8 in. 2 Pieces Electrode of 3/16 in. Owner's Manual.