Savannah Stoker is what I ran in two Traegers and am using in my Royall RG200 and Blaz'n Grill Works Grid Iron.
Along with the ability of numerous parameter adjustments the Savannah Stoker Version 4 has an improved Auto-Relight program, a 3 Stage Cooking Program, and a Food Sensor. Also includes the controller, a grill temperature sensor, and the food probe.