... output, 2. 60% duty cycle, 3. TIG/MMA/CUT 4. reasonable price for muti-function welding machine FEATURES of Multi-function AC/DC ... 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, ...