This fence really works unbelievably well. I have it set up on the backyard's wall. We have about 0.4 acres of land in the back yard and our dog is able to enjoy most of it. He kept digging under our fence and escaping so we had to get an electric fence. Side note: You are supposed to train the dog that coming back from the beeping collar is a good thing. We just let our dog get shocked once and he knows the beeping means come back or else. He learned the boundary very quickly.as for functionality, it has kept me from running though my neighbors' yards at wee hours of the morn. 5 stars.