You will find later that electing not to do the EXACT training that the fence manufacturer recommends is a very poor decision.
I specifically forbid the use of these types of fences for primary confinement in my sales agreement.
I had the BEST BRAND, an actual Invisible Fence, I did the training, and even with special collars, and even a harness with the prongs on the chest did not work for my dog.
These fences fail during any power outage, and if the owner is not VERY attentive to replacing collar batteries.
Dogs can and will run through the fence for strong distractions, and will NOT come back in.
These fences do not keep any other animals or people OUT, and so are expressly unsuitable for any breed that may have territorial or guarding tendencies.
Please reconsider doing the training in the manner that the manufacturer recommends.