Halo Collar is an award-winning virtual dog fence. It is an all-in-one dog safety and containment solution that allows you to instantly create up to 20 GPS wireless dog fences, so your dog is safe at home in your backyard and everywhere you go. Halo is the most advanced wireless dog fence and GPS dog collar, giving you the ultimate dog safety solution. Your dog will benefit from an expert training program designed by world-renowned dog behaviorist, Cesar Millan, combined with custom feedback that's just right for your dog. Today, over 120,000 dogs and 350+ breeds are using the Halo Collar across the United States. Whether your dog is 6 months old or 10 years old, Halo has been proven to work for dogs of all ages.