Expand your Pawz Away™ Outdoor Pet Barrier system with extra barriers to keep cats and dogs away from gardens, water features, pools and other places you want to them to avoid. You can protect and unlimited number of areas in your yard. This system gives you 2 setup options: The wireless setup protects a circular area up to 16 feet in diameter,or you can also create a custom-shaped barrier using up to 150 feet of boundary wire (sold separately). Cleverly designed to resemble a rock, the transmitter blends seamlessly into your landscaping and sends a safe static correction to your pet’s receiver collar when they enter a “no pet” zone. You can add an unlimited number of pets to the system if they’re wearing a PetSafe Pawz Away® Receiver Collar (additional collars sold separately). Trust PetSafe to help keep your pet healthy, safe and happy.