The very first question you must ask the person or dealer you would buy this machine from, is where is the local service center?
Most likely they will tell you there is none because most likely the machine is a Chinese knock off and you can't return it to the dealer nor find local service centers. This is the new game from the Orient. They have given up doing quality control checks on outgoing product because their statistical process control is so good that only one in a million welders will be defective. If you happen to be that one in a million, you are screwed unless the dealer will exchange it. If exchanged, then you have a million to one chance of being happy with your purchase. But don't expect any factory help like you would get from Lincoln or Miller or Sears.