Expand your YardMax®️-Pro dog fence system to protect multiple outdoor areas. An unlimited number of Barriers will work with your pet's YardMax Receiver Collar.

System includes: A YardMax®️-Pro transmitter rock that requires 4 alkaline D batteries, not included. 

• For dogs and cats 5 pounds and up
• Add extra barriers for any number of protected areas
• Add an unlimited number of pets with additional collars
• Waterproof