Multifunctional TIG/MMA/CUT 3 in 1, easy to operate, portable, durable Technical data of plasma welding CT520About the products -Our D series for 110/220 duel input voltage -Our multi-function welders are made with advanced inverter technology -High frequency(as high as 100HZ) -High power factor V-MOS, reduce the voltage and rectifies current -Weight and volume are greatly reduced, but efficiency ...