1.Built-in micro-computer, Providing digital thermostat and temperature display. 2.Monitoring and adjusting the temperature of tip by inserting-card.For a set temperature, it will not change unless the card reinserted . 3.The handle is smart enough for long time use. 4.Automatic sleep and off function saving the power and prolonging the heater's life. 5.The melting tin on the tip can flow into the welding iron frame and won't splash on the working table. 6.The welding table and welding frame are Separated. 7.Operated or displayed under Celsius or Fahrenheit temperature for your optional.