Invisible Fence® R21 Compatible Dog Fence Collar 7k Frequency
The Perimeter Technologies Computer ReceiverTM Collar is designed to replace your Invisible Fence brand R21TM collar or add a new pet to your existing Invisible Fence system for a fraction of the cost.
The Perimeter Computer ReceiverTM Collar will work with your existing Invisible Fence brand 7K or 10K dog fence system.
The collar receiver is completely waterproof …