Designed with your dog in mind
Ultra-durable without compromising on style or comfort — our Series 3 was made to take a licking.
Ready to Play Rough
Industrial-strength stainless steel frame to win any game of tug-of-war.
Seriously Waterproof
IP68+66K tested for fresh and salt water swimming.
Performance Meets Comfort
Low-profile design made for 24/7 wear, even on the smallest dogs.
Fetching Styles
Clip on new colors. Unlock new looks.
Sizes for All
Modular design fit for XS to XL dogs.
Fi Puppy Warranty: Swap your collar for free when your puppy is full grown.
Leading the Charge
Power up with wireless charging and up to 3 months of battery life.
Midnight Walks Welcome
Keep an eye on your dog even in the dark with a colorful night light.
Adventure-Ready GPS
Track with confidence and precision. Series 3’s GPS uses up to 70 satellites, so you’re with them every step of the way.
Always-On Tech
The Series 3 device senses each movement — powered by a platform that understands their activity to know where they are and what they're doing all the time.
Swap Styles with Ease
Change up your Series 3 to sport a new look, choosing from our classic colors and hundreds of third-party designs.
Built Wolf Tough
See how the Tahoe Wolf Center uses Fi collars to keep their wolves’ whereabouts known and stay on top of their health.
★★★★★
Editors’ Choice Award
for its streamlined design, faster location updates, and longer battery life
★★★★★
Searches for your canine companion
without killing the collar’s battery
★★★★★
More comfortable around your dog’s neck
