I wouldn't have high hopes of this system working to well, It's basically just like an electric fence. Heidi's family own stables and have quite a few ponies, they have used electric fences for as long as I can remember around the field to keep them in.....It works great for that purpose but I can't see how it could be adapted for smaller animals, especailly ones that travel at lightspeed!
Theres a system over here thats called "Invisable pet fencing". It works by laying a cable underground around the perimeter of your property, and then having your pet wear a collar which gives it a very small shock combined with a high pitched sound....It suppose to keep them a set distance away from the boundary line in theory!
I have every faith that both systems will work with dogs and other livestock, but cats and electric shocks just won't work IMO......even though the current is tiny and only comparable to a static shock.
Bengals are high strung at the best of times.....no need to charge them up anymore!