Keep your pet safe out in your yard and in your home! The DFG Indoor Radio Fence Transmitter is a safe and easy-to-use system that effectively keeps your pet out of certain rooms, off furniture, away from trashcans, and more. Simply plug in the unit near the area you want to protect. When your pet gets near the area, his receiver collar (not included) sends a warning beep, followed by a safe, mild static correction. Your pet will quickly learn to avoid the off-limits area. ***Only works with PetSafe systems. It is not compatible with the PetSafe YardMax®️-Pro System.