The Tagg pet tracking system uses advanced GPS tracking technology to allow you to see where your dog is and receive a notification if he or she wanders off. The lightweight tracker attaches to your dog's existing collar, and is designed to be worn at all times, even while swimming. The Tagg tracker securely attaches to your dog's collar with a two-piece clip. Once the collar clip assembly is attached, putting on the pet GPS device is a snap. If your dog has multiple collars, we recommend one collar clip assembly per collar. Pinpoint your dog's whereabouts on the Tagg Map. After you locate him, zoom in. Take a look at his exact location on a computer, smartphone, or using the Tagg mobile app. Need directions? Tagg provides those too. 3 months of service included Advanced GPS and wireless tracking technology Purpose built for pets over 10 pounds Free Tagg app for iPhone, Android and Verizon Apps Purpose built for pets over 10 pounds, text and email alerts *This product is Recertified. A recertified product is one that is returned by a customer, for whatever reason, and then restored to original working condition after undergoing an intensive inspection process by qualified technicians. The recertified product is then offered at a substantially discounted price. All stock of our current products are guaranteed to be in working condition and have been successfully tested for optimal performance. 7 day return policy is in effect for both in-store and online purchases. See in store for more details.