We picked this up to help us train the new puppy to stay within the bounds of our front yard. We started with having her tethered with a long rope (in case she decided to bolt) and used the beep and vibrate to make sure she listens and responds to the commands. After a short time we were able to take her out without the tether and let her run the space. While we still use it as a backup, I think if she ever went out the door without us I believe she would not run away. I really credit this training collar with that.