Creates a Secure Play Area: The PetSafe Stubborn Dog In-Ground Fence Receiver Collar allows you to add another dog to your In-Ground Fence System so all your pets can safely enjoy outdoor play Safe Static Dog Collar: This waterproof, adjustable collar has a tone and vibration mode and 4 levels of safe, static correction that can be adjusted to your dog's needs and temperament Adjustable Neck Collar: The waterproof, battery-operated receiver collar is designed to fit dogs more than 6 months old weighing at least 8 lb and offers adjustable neck sizes from 6-28 in Global Mission, Local Care: With U.S. roots and worldwide reach, PetSafe delivers vet- and trainer-recommended solutions and exceptional customer support to create fields of joy for pets 25 Years of Trust: Since 1998, PetSafe has created safe, innovative, and trusted products that bring joy, enhance pet lives, and support the lifelong bond between pets and their families