ELECTRIC FENCE: Experience the ease of a dog electric fence with the SportDOG Brand Contain + Train System. This electric fence for dogs provides everything necessary to cover 1 1/3 acres of land for one dog, and can be expanded to cover up to 100 acres with additional wire and flags.\nVERSATILE COLLAR: With the included collar, an in ground dog fence system is at your fingertips. This inground dog fence system is compatible with both the fence boundary and the handheld remote, giving you the power to decide when it should work with each system.\nMULTI-DOG SYSTEM: With the SportDOG Brand Contain + Train System, fences become a thing of the past. This dog fence allows you to contain an unlimited number of dogs with additional collars, and train up to three dogs with the included remote.\nTRAINING OPTIONS: The sport dog fence receiver collar offers Tone, Vibrate, and Stim options to contain and train your dog. This in ground invisible fence for dogs offers seven levels of static stimulation, along with vibration and tone options, providing a variety of choices to best suit your dog\\\'s training needs.\nSAFETY FEATURES: The safety-focused features of the train system are a major benefit. This in ground dog fence system comes with a wire break alarm and built-in lightning protector, ensuring the safety and longevity of the system.