... /MMA/CUT 4. reasonable price for muti-function welding machine FEATURES of Multi-function AC/DC Pulse TIG/MMA/CUT Welding machine ... pulse output , soft switch, inverter with 100 kHz high frequency;2.Compact structure, stable welding current, steady and intensive arc ... multiple functions of TIG, MMA and CUT;4.With pulse function;5.Thermostatic protection, over-voltage protection, over-current protection, ...