Originally, I started with wireless pet fences, but they always malfunction. They ALWAYS malfunction. But your pup can't tell you what's happening to it. GPS collars really malfunction out here where I live so I tried this collar with my rescue mutt and it's more fun to just watch her know where her land ends. This collar has little generic sayings, like "Go Home", "Good", and a whistle, but what I like most is the Two-way doggie Talkie feature and how she'll bounce around trying to see how I got into her collar, until she comes to find me. I hated the shock collars and kept em on vibrate and beep. This is the option that I was looking for.