... . 3. CE,SGS, ISO9001, CCC MIG-500P Double Pulse Aluminum Inverter Digital Welding Machine Order No.ZT5751Product ModelMIG-500PInput Voltage/Frequency3 ... be set.3, Can store 100sets customized welding parameters4, Digital controller can control the waveform.5, Digital wire-feed controlling system ... welding, carbon air gauging. MIG-500P Double Pulse Aluminum Digital Inverter IGBT MIG Welding Machine