The gizmo didn't workout for one of my dogs.
When I moved to my current house, the back yard was fenced. The length of the back of my yard was 6 foot stockade. The front and sides were 3-rail split rail fence with wire mesh solidly secured to the wood fence.
Jumping the fence was no problem for my female Drahthaar. So, I decided to get an Innotek fence. I did it the easy way and staple the wire to the underside of the top rail. The claim was that the fence had "Run-Through Prevention".
Run-Through Prevention – This INNOTEK® system includes a unique "run-through" prevention so that your dog cannot escape the pet fencing field without activating a strong stimulation. The collar automatically increases the stimulation when your dog continues more than 1/3 of the way through the pet fencing field, regardless of the trans- mitter stimulation level setting. For example, if the signal is detected 12 feet from the wire and your dog enters the pet fencing field, this feature is activated when he is approxi- mately 8 feet from the wire. At this point, your dog auto- matically receives the highest level of stimulation.
The audible alarm on the collar went off about 12 feet back from the fence. It didn't matter. The dog would still jump the fence if it saw a squirrel or groundhog in the neighbor's yard. When I caught my dog in the neighbor's yard and explained to her that I wasn't happy, she learned to jump back into our yard (taking the hit from the collar again) before I got to her.
The thing was cranked up to full power. It was absolutely secure to her neck. My kids told me that sometimes she would vocalize the fact that she was taking the hit. It didn't matter. It didn't stop her if there was something she really wanted to get.
She never did it if I was in the back yard. But, once, she didn't know that I was in the front yard and she jumped back over once she saw me. She figured that if she was in our yard, I couldn't correct her. She was right.
The solution? I replaced the split rail fence with vertical 5 foot picket fence. The dog couldn't see as easily through the fence and never tried to jump it.