This auction is for a brand new 3-in-1 multi-functional welder. This welder is made with advanced inverter technology, and they have three functions: TIG/MMA/CUT. The inverter power is the power that first changes 50/60HZ working frequency to high frequency (as high as 100KHz) with high power factor V-MOS, and then reduces the voltage and rectifies, and then output with PWM the welding and cutting power of high power factor. By using the inverter technology of switch power, the weight and volume of the mains transformer greatly reduces, while the efficiency is raised by over 30%. When working as MMA or TIG, the outer characteristic is constant current and the welding current doesn"t change with the length of the arc, the current is very stable. When working as CUT, the arc is compressed by the rapid-circulating air, and then its temperature reaches 10000-15000"C in the state of ionization, thus turning into strong plasma arc. The plasma arc into cutting makes the energy more concentrating, and gets smooth arc surface, which may take convenience for later work. This industrial grade welder can be widely used in welding and cutting carbon steel, stainless steel, alloy steel, copper and other nonferrous metals. It"s portable, efficient, energy-saving and stable, and the exchange cycle of the assembled machinery can be as high as 85%.