The ET 301i AC/DC is a high output, full digital control, AC/DC, Stick/Liftarc TIG/HF TIG, inverter power supply with expanded input voltage capabilities for maximum flexibility. This unit is specially designed for precision TIG and Stick welding of all weldable materials. Superior, true square wave output combines with balance and cleaning features to deliver unbeatable welding performance with extended tungsten life on aluminum and magnesium alloys without the need for continuous high frequency.