PetSafe Stubborn Dog In-Ground Radio Fence System is safe and effective for all hard to train pets. The system works by delivering mild static correction through two contact pionts that touch your pet's nec. If your pet crosses the established barrier, a correction will be sent to get your pet's attention, but will not harm him. The adjustable collar allows you to creat a perfect fit for your pet. Plus, there are two sets of Contact Points to choose from depending on the length of your pet's coat. PetSafe Stubborn Dog In-Ground Radio Fence System also features a tone plus vibration only mode for effective pet training. Pick up a dog fense and keep your pet safe. System includes Transmitter with Poser Adapter Receiver with adjustable collar Step-by-step installation and training DVD Operating and training guide 9 volt battery 500 feet of wire and 50 training flags Test light tool Receiver designed for stubborn or hard to train pets Covers up to 10 acres with additional wire and flags Low battery indicator Tone plus vibration only mode for training Operating and Training guide Lifetime limited warranty Click here to download operating and training guide in pdf format. You probably do not have the Flash Player installed for your browser or the video files are misplaced on the server!