While I was looking for a fence that will keep my dog away from the busy street, I saw this invisible fence, which there is no fence at all. At first, I was a skeptic because how could it be a fence without a fence?! But when I read the details, it turns out that it works thru an internet wifi which is attached to a collar. If the dog will go over the limit of the signal, the dog will receive a little shock which will allow the dog to think that he/she should not go over beyond 10 meters (example only) or he/she will receive a shock. It's really fantastic! Internet and wifi system can do a lot of things that will help us people.
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