
The Perimeter receiver Collar is fully compatible with most versions of the Invisible Fence® system and available for a fraction of the cost. Match your transmitter to the chart below to ensure system compatibility. Newer models of Invisible Fence® Brand are not yet compatible with the Perimeter Technologies Collar. Locate your Invisible Fence Brand® Transmitter usually located in your garage, basement or outdoor box. If it looks like one of the transmitters pictured in the green box you have a compatible system.
Once you've determined that you do have a compatible system, you'll need to verify the frequency your system is running on. The image below illustates the location of the frequency indicator switch in your transmitter. Please indicate the frequency your system uses in the dropdown box above to ensure you receive a properly configured collar.

The following model numbers are compatible with the Invisible Fence® compatible collar:
- Model #: ICT-50 ( Blue Case)
- Model #: ICT-75 ( Blue Case)
- Model #: ICT-150
- Model #: ICT-100 ( Blue Case)
- Model #: ICT-100A (Blue Case)
- Model #: ICT-250 ( Blue Case)
- Model #: ICT-700 (Gray Case)
- Model #: ICT-725 (Gray Case)
- Model #: ICT-750 (Gray Case)
- Model #: ICT-775 (Gray Case)
- Model #: AT-950 Indoor Transmitter
- Model #: CT-4000
- Invisible Gate
- Model #: ICT-50 (Blue Case)

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Perimeter Technologies Invisible Fence R21 Replacement Collar Battery (IMPI-POWER)Regular Price: $15.95 Special Price: $9.95 |
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Good quality Review by Robert
Price Value Quality I needed a new invisible fence collar to replace a collar we had for our dog. It was lost and we looked for weeks to find it. I knew it would be several hundred dollars for a new collar from my local dealer. Times are tight, so I wanted to see if I could find something cheaper.
This collar was just what I was looking for. It was much more reasonable in price than the local guy. I ordered it and it works just fine with my fence. My dog is back in the yard and I saved some money. Very happy with the quality. (Posted on 1/2/13) -
Wallet friendly! Review by Sandra
Price Value Quality I needed a collar for my new puppy. I called my local invisible fence rep for a new collar. He told me it would be $350! I love my dog, but $350 is a lot of money! I decided to search online to come up with an alternative. I found this collar! It works perfectly with my existing fence. The collar was also almost $200 cheaper. This collar is every bit as well made as the original collar. A+ (Posted on 12/11/12)
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Compatible collar Review by JUNE
Quality Price Value This collar Is a great addition to my already purchased invisible fence system. It works as if it was made for my fence and I can’t say one bad thing about it. Both of my dogs a running fence free because of FlexPetz.com.
-June Rash, NV (Posted on 10/14/12) -
Great collar Review by Evan
Quality Price Value “ I was happy to hear that I could get a compatible collar to go with my invisible fence I owned. I was actually a bit surprised to find that I worked this well with my current fence. The price I pad for this collar was two times cheaper than the price I paid for my fence so to me it was a not a difficult choice to make. Over the collar is great and worth every dime."
Evan Tike, Flint, MI (Posted on 9/14/12)










