I have the dual-probe and as squirt said it does control the Bradley in each step(there are 6) by IT temp or time. It can also shut the unit down or go into a warming temp when your meat reaches the temp.
For example you can program it to run at 225F until the IT of the butt is 195F. Then when the butt is at a IT of 195F it can shut down or drop the cabinet temp down to say 150F to keep it warm in case you cannot pull it out right away.
It can also control the smoke generator. You can set two steps that activate the smoke generator by time or IT of meat.
For example you can set step one to pre-heat the cabinet temp to 225F. Then once that is reached you can have step two as your smoke program. Then after step two is over by temp or time it will shut off the generator. You can even have it come back on later in the smoke. There is a lot of control and IMHO worth the extra money
Just remember to get the hanging temp probe and not the wall mounted one