<p>Introducing Tactipup's Fi Series 3 Compatible Collar: the perfect fusion of technology and personalization to keep your furry friend safe, stylish, and connected. Designed to work seamlessly with your <a href="https://shop.tryfi.com/products/smart-collar-v3">Fi Series 3 GPS tracker</a> (not included), this collar will ensure your pet's safety while providing a unique touch that sets them apart from the rest.</p> <p>This product is <span style="text-decoration: underline;">NOT</span> compatible with Fi Series 1 and 2 GPS trackers. </p> <p><strong>**Please note**: Accurate size is needed for the proper fit.  If your dog is between two sizes, order the larger size.  <a href="https://www.tactipup.com/pages/2-ways-to-measure-a-dogs-neck-size">Here is how to easily measure your dog's neck<span>.</span></a></strong></p>