Different rules for different pets... If you've tried everything and your pets keep getting into trouble, PetFree™ is your ideal solution. An indoor PetFree system can keep your dogs and cats away from areas you want them to avoid. Pets stay trouble free indoors with PetFree If your dog or cat is already trained to your outdoor Invisible Fence system you can take advantage of that training and transfer it inside your home! Keep your cats and dogs off the sofa or train them not to enter the baby's room. You can select an individual piece of furniture or an entire room or area in your home. These small transmitters broadcast the same signal your Invisible Fence Brand system does - and you can adjust how far the signal reaches! Works with your existing Computer Collar’s microprocessor.