Sigma Galaxy 500 description: Digital memory with Migatronic MJC, Lower power consumption - less effect on the environment, IAC Intelligent Arc Control automatically adjusts the arc 50,000 times per second, MigaLOG for easy collection of welding data from your Sigma Galaxy, IGC Intelligent Gas Control - synergic gas flow with large-scale reduction of gas consumption, “Gas monitoring” - another IGC feature, Large-scale reduction of gas consumption.