This wireless containment system efficiently protects my dog from running into traffic. To the left side of my house is a busy road which is a very perilous trip for my dog if it walks on it. In order to keep my dog away from the road, I bought a traditional fence at first. It was an iron fence that cost me a lot of money and time to put it into work. But with the growth of my dog, I found it could jump over the fence! That was unbelievable cause the fence was 5 ft! Furthermore, it was scraped by the pointed top of the fence when crossing it. Therefore I determined to try this product under the recommendation of my friends. Frankly, this product was easy to set up and I only needed to follow the training instructs to chasten my dog. Luckily, my dog was smart that it quickly learned what the shocks mean. From then on, my dog hasn’t crossed the flags, which perfectly solved the trouble.