The Pawz Away Extra Mini Indoor/Outdoor Pet Barrier allows you to set up pet free zones in your house. This barrier is compatible with your pets PetSafe Pawz Away Receiver Collar. When your pet enters the barrier area, he will hear a series of beeps, then feel a safe static correction on his receiver collar to teach him boundaries. You can add an unlimited number of pets to the system if theyre wearing a PetSafe Pawz Away Receiver Collar. Expand your Pawz Away Pet Barrier system with extra barriers to protect multiple areas around your home.