The Fi Series 3 Collar Attachment has become a game-changer for dog owners seeking the latest in pet tracking and safety technology. This smart device, designed to work with the Fi smart collar, is the latest iteration of Fi’s innovative pet-tracking solutions.
Learn what size collar for a Rottweiler is ideal by following this detailed guide to ensure a perfect fit for your dog’s comfort and safety.
The Fi collar and its corresponding attachment allow owners to monitor their dog’s activity, location, and health data all from a mobile app, ensuring that their furry companions are always within reach, even in the most remote locations.
In this comprehensive guide, we’ll walk through everything you need to know about the Fi Series 3 Attachment — from its features and benefits to how to set it up, its specifications, pricing, and maintenance.
Whether you’re already using the Fi collar or considering purchasing one, this guide is packed with useful information to help you understand how to make the most of this advanced pet technology.
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ToggleWhat is the Fi Series 3 Collar Attachment?
The Fi Series 3 Collar Attachment is a GPS-enabled device that connects to your dog’s collar, offering real-time tracking, activity monitoring, and location updates. The device integrates with a mobile app, giving you access to detailed reports about your dog’s daily behavior, exercise levels, and geographical movement.
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The Fi Series 3 is the third generation of Fi’s popular smart collars, known for their sleek design, long battery life, and rugged durability. The attachment is designed to be easy to use, providing both pet owners and their dogs with more freedom, security, and peace of mind.

Key Features of the Fi Series 3 Attachment
Here are the standout features of the Fi Series 3 Attachment:
- GPS Location Tracking
The primary function of the Fi collar is real-time GPS location tracking. Using a combination of GPS, Wi-Fi, and cellular connectivity, the Fi collar allows you to track your dog’s movements with incredible accuracy. The collar works globally, which means you can track your dog anywhere — even if you’re traveling to rural or remote locations. - Geofencing
With geofencing, you can create virtual boundaries for your dog, like around your home or yard. If your dog crosses these boundaries, you’ll receive a real-time notification on your phone. This feature is particularly useful for pet owners with dogs that tend to wander or escape, giving you an immediate heads-up so you can act quickly. - Activity Monitoring
The Fi collar attachment monitors your dog’s daily activity levels, tracking their exercise, sleep, and overall health. The app will provide insights on whether your dog is getting enough exercise based on their breed, size, and age. This feature also lets you set goals for your dog, encouraging you to take better care of their fitness and well-being. - Long Battery Life
One of the most significant improvements of the Fi Series 3 Collar is its battery life. The collar lasts up to three months on a single charge, which is substantially longer than many other GPS collars that need frequent recharging. This long battery life is a major selling point for Fi users who want the convenience of minimal maintenance. - Waterproof and Durable Design
The Fi Series 3 Collar is built to withstand the rigors of outdoor adventures. Whether your dog enjoys swimming, hiking, or playing in the rain, the collar is designed to be waterproof and durable. The device can endure harsh weather conditions and remains operational no matter what activities your dog is engaged in. - Mobile App Integration
The Fi mobile app allows you to manage all features of the collar attachment from your smartphone. You can view your dog’s real-time location, track their exercise, and even check the battery level of the collar. The app is available for both iOS and Android, ensuring that users can easily access the features no matter their device. - Multiple Size Options
The Fi Series 3 Collar Attachment is available in multiple sizes to suit different dog breeds. The adjustable design ensures a comfortable fit for small, medium, and large dogs, with a strap that is made from high-quality, long-lasting materials.
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Specifications of the Fi Series Collar Attachment
Understanding the technical details of the Fi Series Collar Attachment will help you make an informed decision when purchasing. Here are some key specifications of the device:
Dimensions and Weight
- Weight: The Fi Series collar attachment weighs about 1.3 oz (36 g), which is lightweight enough not to burden the dog but durable enough to hold up in tough conditions.
- Dimensions: The collar attachment is approximately 1.8 inches (4.5 cm) long, 1.5 inches (3.8 cm) wide, and 0.75 inches (1.9 cm) thick, ensuring it fits comfortably on your dog’s neck without causing discomfort.
Battery Life
- Up to 3 Months on a Single Charge: The battery life of the Fi 3 collar attachment is among the longest available, lasting up to three months on a single charge under normal use. This impressive battery life is made possible through low-power GPS technology and efficient use of the cellular network.

Connectivity
- GPS and Cellular Connectivity: The collar uses GPS for location tracking, with cellular service covering a variety of network providers. The collar operates on 4G LTE technology and can be connected to your smartphone through the Fi app.
- Wi-Fi: The collar also supports Wi-Fi, which allows for more efficient data syncing when your dog is at home and within range of your Wi-Fi network.
Compatibility
- Collar Sizes: The Fi Series 3 attachment fits collar sizes ranging from 11 inches to 29 inches in circumference. The collar’s attachment device can be easily affixed to most standard dog collars, whether they are fabric, leather, or any other commonly used materials.
Durability
- Waterproof Rating: The Fi Series collar attachment is rated at IP67, meaning it is fully waterproof and can be submerged in up to 1 meter of water for up to 30 minutes without damage.
- Temperature Resistance: The collar is designed to withstand extreme temperatures, ranging from -4°F (-20°C) to 122°F (50°C), making it suitable for various weather conditions.
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How to Set Up the Fi 3 Collar Attachment
Setting up the Fi 3 Collar Attachment is simple and straightforward. Here’s a step-by-step guide on how to get started:
Step 1: Charge the Collar Attachment
Before attaching the collar to your dog, ensure that the Fi Series collar attachment is fully charged. Use the included charging base to charge the collar for 1 to 2 hours until it reaches full power. You’ll know the collar is fully charged when the indicator light turns green.

Step 2: Download the Fi Mobile App
Next, download the Fi mobile app on your smartphone. The app is available for both iOS and Android, so you can easily download it from the App Store or Google Play Store.

Step 3: Create an Account
Once the app is installed, open it and create an account. You will be asked to enter basic information, such as your email address, name, and payment details (if you choose to purchase a subscription). After setting up your account, you can proceed to set up the collar.
Step 4: Pair the Collar with the App
Open the Fi app and follow the prompts to pair the collar with your phone. You’ll be asked to enable Bluetooth and allow the app to access your location. The app will automatically search for the Fi Series 3 collar, and once it’s detected, you’ll receive a notification asking you to confirm the connection.
Step 5: Attach the Collar to Your Dog
After the pairing process is complete, you can attach the collar to your dog’s neck. Adjust the fit so that the collar is snug but not too tight — you should be able to fit two fingers between the collar and your dog’s neck. The collar should sit comfortably without causing discomfort.

Step 6: Set Up Geofencing and Tracking
Once the collar is connected to the app, you can customize settings such as geofencing and activity monitoring. Set up virtual boundaries (geofences) around areas like your home or favorite dog park, and configure alerts so that you’re notified whenever your dog leaves these designated zones.
Step 7: Monitor Your Dog’s Activity and Location
You can now use the app to track your dog’s real-time location, monitor their activity levels, and check the battery status of the collar. The Fi Series 3 collar will automatically sync data with the app, keeping you updated on your dog’s whereabouts and health status.
For insights on whether Pomeranians should wear a collar, including considerations for safety and alternatives, check out this informative article.
Pricing and Subscription Details for the Fi Series 3 Collar Attachment
The Fi Series 3 Attachment offers a premium pet-tracking experience, but it comes with a cost. Here’s a breakdown of the pricing:
Initial Purchase Price
- Fi Series 3 Collar: The Fi Series collar attachment typically costs between $149 to $199, depending on the retailer and any ongoing promotions. This price includes the collar itself, which comes with the GPS attachment but does not include the subscription fees.
Monthly Subscription Plan
- Subscription Cost: The Fi Series 3 collar requires an annual subscription plan to access GPS tracking, activity monitoring, and other features. The cost is typically $99 per year, or about $8.25 per month. This subscription covers the use of cellular data, which enables location tracking and syncing with the Fi app.
For a comprehensive guide on what kind of harness is best for a Pomeranian, including comfort and safety tips, check out this article.
Pros and Cons of the Fi Series 3 Collar Attachment
Pros
- Long Battery Life: The Fi Series 3 collar can last up to 3 months on a single charge, which is much longer than most GPS dog collars.
- Advanced Features: With real-time tracking, geofencing, and activity monitoring, this collar offers everything a pet owner needs to keep their dog safe and healthy.
- Durability: The collar is waterproof, durable, and can withstand extreme weather conditions, making it perfect for active dogs.
- Ease of Use: The collar is easy to set up and integrates seamlessly with the Fi app for convenient monitoring.
Cons
- High Price: While the Fi collar offers great value for money in terms of features, it is still relatively expensive, especially when factoring in the subscription costs.
- Requires Subscription: Without the subscription, you won’t have access to the full range of features, including GPS tracking.
- Size Limitations: While the collar attachment fits a wide range of sizes, it may not fit extremely small dogs.
Wrapping Up
The Fi Series 3 Collar Attachment is an advanced and reliable tool for pet owners who want to ensure their dog’s safety and health. With features like GPS tracking, geofencing, and activity monitoring, this collar offers unparalleled peace of mind for pet owners. Its long battery life, durability, and compatibility with the Fi app make it a top choice for dog owners worldwide.
While the Fi Series 3 collar comes at a premium price, the combination of its powerful features and ease of use make it well worth the investment for many pet owners. Find out what color collar looks best on a Rottweiler to complement their bold appearance and highlight their unique features.