1.Small and light: with the mid-frequency transformer which is extremely smaller than the traditional welding power sources:weighing one fifth to one tenth as much as traditional welding power sources;only one third as big as the traditional welding power sources; 2.Efficient and energy-saving:because inverter welders reduce the wasted power by using less copper and steel.Over one third power consumption will be saved because the efficiency is 80% to 85% while th power factor is as high as 0.93; 3.Having step-less adjustment for welding current and voltage.Different requirement of different welding technique will be reached; 4.Stable welding with small spatter and outstanding welding performance; 5.With the function of auto-compensation against power fluctuation; 6.Design integrated;welding anywhere at any time;easy to operate. Model MIG200S MIG250S MIG250Y MIG300Y Net Weight 35 35 35 35 Dimension 655*300*665 655*300*665 570*295*558 655*300*665.