Indoor Radio Fence by PetSafe is safe, easy and effective. Just place the small, disk-shaped transmitter (about the size of a Frisbee) near the area you want to protect. Then adjust the range from as little as 2 feet to up to 10 feet. Your pet then wears the same receiver that is used for most of our outdoor containment systems (the receiver from the Instant Fence system will not work on the Indoor Radio Fence.) When your pet gets near the signal a warning beep sounds on the receiver. If he continues to approach the protected area, a mild correction is given. The Indoor Radio Fence can be used for as many pets as you have! Each pet needs to wear a receiver collar which can be purchased separately. With the Ultralight Receiver, you can even use this system for cats! | 
