Features Minimizing, lightness,high quality and energy-saving. Good arc-starting and arc force,it can resist disturbing stable arc and little spatter. High welding quality,deep penetration and strong strength. Auto protection of over-voltage and over-current.Be able to work continuously, it can balance automatically when voltage is waving. Suit for welding all kinds of basic welding rod. Be able to weld cellulose rod. MMA160,5.3KVA,30-160AMP,30%DUTY CYCLE,8KG; MMA200,7KVA,30-200AMP,30%DUTY CYCLE,8KG; MMA250,9.4KVA,30-250AMP,30%DUTY CYCLE,19KG.