Wireless Freedom: The PetSafe Wireless Pet Containment System Receiver Collar can be used to add additional dogs to your Wireless Pet Containment System so all your pets can safely enjoy outdoor play Safe Wireless Fence: With 5 adjustable correction levels, a tone-only training mode, and static-free reentry, this static collar tailors to your dog's temperament and reinforces positive behavior Adjustable Neck Collar: The waterproof, rechargeable receiver collar fits dogs more than 6 months old weighing at least 8 lbs 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