This is a DC machine which welds steel, stainless, chrome moly, etc. Comes with TIG torch, gas valve, and electrode holder. The Pro-Tec allows you to leave the battery connected while welding or cutting on cars by making a complete circuit. Many welders have been disconnecting the battery before welding on cars, then having to re-set clocks, radios, and alarm systems after completing the work, sometimes finding that the components were damaged anyway. A voltage spike occurs at the initial spark of welding and can damage computers regardless of whether or not the battery is connected. .
Surges can happen anytime.
Surges can increase the voltage in the circuit from 12V to 20V, and spikes can increase them five times as high or more. The average car today has 4 computers. Order one today for each work bay. You no longer have to spend a fortune to breathe clean, pure air while welding. This system is worn comfortably around the waist and works up to 8 hours on a battery pack charge.