PowerTIG 325EXT is built for superior industrial performance. With Digital microprocessor control over the Infineon IGBT inverter, and up to 320 amps of welding Power, the PowerTIG 325EXT packs the most punch of any AC/DC TIG welder in the Everlast line. The module design of the IGBT’s creates a reliable platform designed for years of service. The unit is equipped with many features that improve its value in the shop. One of the features that is highly useful is the Advanced Pulse in AC which can greatly increase penetration while welding aluminum, and make it seem like you are welding with a lot larger machine than you are. Wave form control, AC frequency and AC balance control combine to round out the welder into a very capable Aluminum welder. However, the DC capabilities should not be overlooked either with plenty of features which includes a standard pulse frequency up to 500 Hz, and a wide range of adjustable 2T/4T functions. AC/DC TIG, DC Stick . 208/240V 1PH and 3 PHASE, 320A/22/8V at 35% Duty Cycle/ 40 C.