Staff Answer
May 28, 2025 - 03:44 PM
Yes, they do! Fortunately, the new Fi 3+ model is designed to be fully compatible with the end links used in the regular Series 3 model. If you already own one of our compatible collars and decide to upgrade, rest assured that your existing collar will still function seamlessly. Should you opt for a new compatible collar for your Fi, simply select Series 3 at checkout to ensure perfect compatibility with your Series 3+ device.
