MAIN FEATURES OF MMA: 1. Advance arc force and arc-starting function. 2. Stable arc and less aplash. 3. High welding quality function. 4. Automatic protection of over-voltage and over-current. 5. Be able to work continuously, it can balance automatic. When voltage is waving. 6. Adopt to all kinds of basic and acid electrode. 7. Be able to long-distance welding all kinds of material, stainless steel, steel, tungsten, titanium, nickel and other alloy material. 8. Quick joint. 9. With accessories. 10. Color box. 11. Light and high quality. 12. Single-phase, portable, fan-cooled, thermostatic protection, stepless current. Model Rated input voltage(v)Rated duty cycle(%) 20''CTN 40''CTN MMA-75 220-230 35 540 2250 MMA-105 220-230 35 1120 2250 MMA-160 220-230 60 1120 1390 MMA-180 220-230 60 620 1390 MMA-200 220-230 60 620 1390 MMA-315 380 60 180 362 MMA-400 380 60 180 362