I have no idea if it works but I can see people in HECS suits and coyotes have a lot better eyesight than I have. If I get close enough to a coyote for him to sense my electro impulses he's usually dead.
You know that if your convinced it will work that is 90% of what will make it work for you. Buy it, try it and report your successes. I'd ask for a money back guaranty.