Fi 3+ Behavior Adapter

Keep the collar. Keep the full Fi experience.

Confirm before ordering: this adapter is for the Fi 3+ only and is a collar-only option. The module must hang freely by its endlinks at the neck for Fi 3+ behavior tracking. For a harness, Fi Series 2, or Fi Series 3, choose the Fi Series 2, 3 & 3+ Compact Adapter. Use the Fi compatibility guide if you are unsure.

The Fi 3+ Behavior Adapter lets you mount a Fi 3+ module directly to a compatible collar while positioning the tracker so its motion sensor can collect behavior data as intended.

The module is secured at two snap points, giving you Fi 3+ behavior tracking, GPS location, and geofence functionality from the collar your dog is already wearing.

Choose the width that matches your dog’s collar, then select the snap style and hardware finish that works best for you. Current options accommodate ¾-inch, 1-inch, 1½-inch, and 2-inch collars, with an option for other widths when needed.

This adapter is designed for collar use only. If you want Fi 3+ GPS and geofence capability on a harness, choose the Fi 3+ Compact Adapter instead.

Handcrafted in Alaska using durable polyester webbing and marine-grade hardware.

Full Fi function. On the collar they already wear.