The PowerTIG 255EXT is a digital inverter based welder that delivers exceptional power and performance. The PowerTIG 255EXT is competitive in performance when comparing feature to feature against the competition such as memory, pulse and wave forms. When you compare additional features the welder offers, such as advanced AC pulse and hot start and arc force control for the stick function, the PowerTIG 255EXT really stands out. Advanced Pulse is a new feature introduced on the digital power TIG units which improves top and low end performance on aluminum. It can be set up to increase penetration on thick aluminum up to 25% over what is traditionally accepted as the maximum limit for the maximum output of the welder. Two "Easy Start " modes also add to the versatility of the welder while keeping operation simple. The stick welder features hot start time, hot start intensity and arc force control adjustments, making it an ideal welder for E6010 or E7018 welding. New features that have been recently added are the   spot weld timer feature that allows the operator to make consistent spot welds when tacking up or welding sheet metal. The 255EXT also has a more convenient way to purge gas and set gas without initiating arc flow with a dedicated purge button. Most importantly the PowerTIG 255EXT operates on 120V or 240V. Maximum output during 120V operation is 150Amps for TIG, and 120Amps for stick.