This thing has more controls than the space shuttle, They are all defined with definitions it has an AC balance control AC/DC frequency control it has blue spark and noise control. It also tells you how and defines the pulse option, You can use a foot paddle to start your arc or you can use a finger trigger on the torch. You can set the amount of time the gas Is on and off so you can cool the Weld and your tungsten prevent warping. You can also adjust the rate of amp increase and decrease So your welding starts are crisp and even. This thing is a game changer!