Using a Collar to Get Control of An Out of Control Dog

We are left to assume what kind of collar is being used in this video, either a shock collar or a “bark” collar that emits unpleasant spray.

I have seen many people get good results from their uncontrollable barking dogs using a bark collar at agility practice getting them to quiet down.

I am not referring to the vocal athletes, I am speaking of the dogs that are non stop barking.

I have never personally worked with the shock collar, but know there are many programs that use it with great success on unmanageable dogs.

Assuming this one is a shock collar it appears to work like magic. Do you have experience with them? Good or bad.