I'm looking for the CT416 welder. CT416 is our newly developed multi-function machine. It can be used as Argon Welder, DC stick welder and air plasma cutting machine. It adopts MOSFET to change frequency of 50 / 60 Hz to high frequency AC of 100KHz, then through step down, rectification, pulse adjusting technology to change it into DC up to the requirements for welding and cutting. Featuring: light, small, with little power expenditure (improves efficiency more than 30% ) , with multi-functions.