This is what I know. There are 6 presets available. So you can set it to cook at one temp for a certain amount of time and then it will change the temp, up to 6 different settings. You can tell it to cook at a certain temp for a specificied amount of time which is what I normally do, Or you can have it cook at a temp until the internal temp reaches a certain point.
The first thing I recommend is to run the auto tune. The manual tells you how to do that I don't remember exactly how to do it but it isn't that complicated. What it will do is allow the pid to adjust itself to your smoker.. Depending on the insulation and type each smoker heats and cools differently, The autotune may take a couple hours but you just need to do it once unless you change something in the smoker.
After the autotune is done press set and you will see EO1, EO2 etc. That means end of time for each preset. t means time and F means temp. Normally I just set it to t and click the + or- button to set the amount of time that it cook at that temp.
There are two probes probe one is the smaller smoker temp probe. Probe 2 is the meat probe. They both need to be plugged in or the alarm goes off. I dont usually use the meat probe so I just leave it hooked up but keep it outside the smoker the smoker temp probe must be inside the smoker otherwise it wil think the smoker is not hot enough and the burner will keep running .
Don't worry. It took me awhile to figure things out and there is still alot of stuff I dont know about it but the more you ise it things will become obvious.
Let me know if you have other questions