The PetSafe Guardian GPS Add A Dog Collar PIF00-17934 is a high-quality GPS collar designed specifically for large dogs. With a static/shock control method, this collar helps in training and obedience by providing gentle corrections when your dog barks excessively. The waterproof feature ensures that your pet stays safe and secure in all weather conditions, making it an ideal choice for pet owners looking for a reliable and durable solution for their furry companions.