These rechargeable collars are designed to work as a perfect replacement for the newer 800 series systems by Invisible Fence®. Different configurations are available to ensure compatibility with your Invisible Fence®. There is a lot of technology that is packed into a very small, comfortable case. Completely waterproof, they are also exceptionally lightweight.
To make certain that your new collar is going to properly communicate with your Invisible Fence® system, you need to find out what frequency your fence is programmed to. The frequency will either be a 10K or 7K. There should be a toggle switch located under the cover of your dog fence transmitter, which will be switched to one frequency or the other. If you are unable to find a 7K/10K toggle switch, you will need to contact your Invisible Fence® dealer to find out which frequency your system is running on.