Introduction
The COROS PACE 3 GPS Sport Watch is engineered for athletes and fitness enthusiasts who demand a lightweight, comfortable, and feature-rich device for comprehensive activity tracking. It boasts an extended battery life, highly accurate dual-frequency GPS, and advanced health monitoring capabilities, making it an ideal companion for various sports and daily wear.

Image: The COROS PACE 3 GPS Sport Watch with a white silicone band, displaying its digital watch face.
What's in the Box
Your COROS PACE 3 package includes the following items:
- COROS PACE 3 Sports Watch
- Charging Cable
- Quick Start Guide
- Product Safety Booklet

Image: A visual representation of the COROS PACE 3 watch, charging cable, and various instruction booklets as they appear when unboxed.
Getting Started
1. Charging the Device
Before initial use, ensure your COROS PACE 3 is fully charged. Connect the provided charging cable to the watch's charging port and plug the USB end into a compatible power source (e.g., computer USB port or wall adapter). The watch display will indicate charging status.
2. Powering On/Off
To power on the watch, press and hold the COROS Digital Dial (crown) until the COROS logo appears. To power off, navigate to System > More Settings > Turn Off, then confirm.
3. Pairing with the COROS App
Download the official COROS app from your smartphone's app store (available on iOS and Android). Open the app and follow the on-screen instructions to create an account or log in. The app will guide you through the pairing process to connect your COROS PACE 3 via Bluetooth. Ensure Bluetooth is enabled on your smartphone.

Image: A smartphone screen displaying the COROS Training App interface, showing various daily training metrics and insights.
Operating Your COROS PACE 3
Watch Interface and Navigation
The COROS PACE 3 features a transflective touchscreen and a digital dial (crown) for navigation. Rotate the dial to scroll through menus and data screens, and press it to select options. The back button allows you to return to the previous screen.
GPS Tracking and Navigation
The watch is equipped with a redesigned dual-frequency satellite chipset, providing highly accurate GPS tracking even in challenging environments like dense urban areas. For optimal GPS signal acquisition, ensure you are in an open outdoor area. The built-in route planner and breadcrumb navigation feature allow you to follow pre-loaded routes and stay on course during your activities.

Image: A COROS PACE 3 watch on a runner's wrist, showing a navigation map with a route and distance remaining, illustrating the navigation and route planner feature.
Heart Rate Monitoring
The next-generation optical heart rate sensor continuously monitors your heart rate during workouts and throughout the day. For accurate readings, ensure the watch is worn snugly on your wrist, just above the wrist bone.

Image: A close-up view of the underside of the COROS PACE 3 watch, highlighting the green light emitted by the next-gen optical heart rate sensor with its 5 LEDs and 4 photodetectors.
Activity Modes
The COROS PACE 3 offers an extensive range of activity modes optimized for accurate data tracking across various sports. Select the appropriate mode before starting your activity for precise measurement of metrics like distance, pace, calories, and more.
- Run, Trail Run, Track Run, Indoor Run
- Pool Swim, Open Water, Rowing, Flat Water
- Bike, Indoor Bike, GPS Cardio, Triathlon
- Ski, Snowboard, XC Ski, Hike
- Strength, Walk, Indoor Rower, Jump Rope

Image: The COROS PACE 3 watch face showing a menu of extensive activity modes, including running, swimming, cycling, and winter sports options.
Sleep Tracking
Wear your COROS PACE 3 overnight to track your sleep patterns and gain insights into your recovery. The watch provides detailed data on sleep stages (deep, light, REM) and resting heart rate, accessible through the COROS app.

Image: A COROS PACE 3 watch on a person's wrist while sleeping, with a smartphone screen in the background showing detailed sleep tracking data from the COROS app.
Training Solution
The COROS PACE 3 integrates with the COROS app to provide a complete training solution. This includes access to training plans, personalized coaching advice, and advanced analysis tools to help you optimize your performance and achieve your fitness goals.

Image: A COROS PACE 3 watch on a wrist next to a smartphone displaying a detailed workout plan within the COROS app, highlighting the complete training solution.
Care and Maintenance
Cleaning Your Watch
Regularly clean your COROS PACE 3 and its band to prevent skin irritation and maintain optimal performance. Use a soft, damp cloth to wipe down the watch body and sensors. For silicone bands, mild soap and water can be used. Ensure the watch is completely dry before charging or wearing.
Water Resistance
The COROS PACE 3 is water-resistant to 5 ATM (50 meters), making it suitable for swimming, showering, and other surface water activities. It is not recommended for scuba diving or high-velocity water sports.
Battery Care
To maximize battery lifespan, avoid exposing the watch to extreme temperatures. Charge the watch regularly and avoid fully depleting the battery frequently. Store the watch with a partial charge if it will not be used for an extended period.
Troubleshooting
Watch Not Turning On
- Ensure the watch is fully charged. Connect it to the charging cable and a power source for at least 30 minutes.
- Attempt a soft reset by pressing and holding the digital dial for 15 seconds.
GPS Not Connecting or Inaccurate
- Move to an open outdoor area with a clear view of the sky.
- Ensure the GPS mode is enabled for your activity.
- Sync your watch with the COROS app to update satellite data (A-GPS).
Heart Rate Readings Seem Inaccurate
- Ensure the watch is worn snugly on your wrist, one finger-width above the wrist bone.
- Clean the optical sensor on the back of the watch.
- Avoid excessive movement or vibrations during measurement.
App Not Syncing Data
- Verify Bluetooth is enabled on both your watch and smartphone.
- Ensure the COROS app is open and running in the foreground or background.
- Restart both your watch and smartphone, then try syncing again.
Specifications
Feature | Detail |
---|---|
Model Number | W331 |
Product Dimensions | 4.13 x 4.13 x 4.13 inches |
Item Weight | 3.53 ounces (100 Grams) |
Screen Size | 1.2 Inches |
Display Type | Transflective Touchscreen |
Battery Life (Continuous GPS) | Up to 38 hours |
Battery Life (Daily Use) | Up to 17 days |
GPS Type | Built-in GPS with Dual-Frequency |
Connectivity Technology | Bluetooth |
Water Resistance | 5 ATM (50 meters) |
Operating System | AsteroidOS |
Manufacturer | COROS Wearables Inc. |
Warranty and Support
For detailed warranty information, product registration, and technical support, please visit the official COROS website or refer to the Product Safety Booklet included in your package. You can also access the comprehensive User Guide in PDF format for more in-depth instructions.
Official User Guide (PDF): Download Here