This is the perfect DIY fix for that runaway dog that you just can't seem to keep out of trouble... you want your dog at home, not running away! It is easy to install and has many features to keep your dog in their proper place. This system has Progressive Tone Stimulus, a warning tone will be issued first, then a shock stimulus if your dog continues to move closer to the boundary. It also has Pulsed Proportional Stimulus, the closer your dog gets to the boundary, the more intense the shock will be. With proper training your dog will never actually get shocked, as they will know to listen to the sounds. This kit comes with training flags so that your dog will know where the shock line is during the training process.