1. AC/DC and pulse output, 2. 60% duty ... muti-function welding machine FEATURES of Multi-function AC/DC Pulse TIG/MMA/CUT Welding machine SUPER- ... AC/DC or pulse output , soft switch, inverter with 100 kHz high frequency;2.Compact structure, stable welding current, ... function;5.Thermostatic protection, over-voltage protection, over-current protection, under-voltage protection, pedal control interface ...