1. Product Overview
The Mibro C3 Smartwatch is a versatile fitness tracker designed for both men and women, featuring a 1.85-inch HD touch screen and 2ATM water resistance. It supports Bluetooth calling, heart rate, SpO2, and sleep monitoring, along with 70 sports modes. This manual provides detailed instructions for setting up and operating your Mibro C3 Smartwatch.

Figure 1.1: Mibro C3 Smartwatch

Figure 1.2: Key features of the Mibro C3 Smartwatch, including dual-core chip, 1.85" HD screen, Bluetooth calling, heart rate monitoring, 70 sport modes, 10-day battery life, and 2ATM waterproof rating.
Product Video
Video 1.1: Official Mibro C3 Smartwatch overview, showcasing its design and various functionalities.
2. Setup
2.1 Unboxing
Upon opening the package, ensure all components are present:
- Mibro C3 Smartwatch
- Charging Cable
- User Manual (this document)
2.2 Charging the Smartwatch
Before first use, fully charge your Mibro C3 Smartwatch. Connect the magnetic charging cable to the charging contacts on the back of the watch and plug the USB end into a standard USB power adapter (not included) or a computer's USB port.

Figure 2.1: The smartwatch display showing battery level, indicating a 350mAh battery capacity.
A full charge typically takes approximately 2 hours. The watch has a 350mAh battery, providing up to 10 days of daily use or 50 days in basic mode.
2.3 App Installation and Pairing
To unlock the full functionality of your Mibro C3 Smartwatch, you need to install the Mibro Fit App on your smartphone.
- Download the App: Search for "Mibro Fit" in your smartphone's app store (Google Play Store for Android, Apple App Store for iOS) and install it. The watch is compatible with iOS 10.0 and Android 5.0 and above.
- Create Account: Open the Mibro Fit App and follow the on-screen instructions to create an account or log in.
- Pair the Watch:
- Ensure Bluetooth is enabled on your smartphone.
- Open the Mibro Fit App and navigate to the device pairing section.
- Select your Mibro C3 Smartwatch from the list of available devices.
- Confirm the pairing request on both your phone and the smartwatch.

Figure 2.2: Illustration of the Mibro Fit App interface, demonstrating the connection process and data synchronization.
3. Operating Instructions
3.1 Basic Navigation
The Mibro C3 Smartwatch features a 1.85" HD touch screen for intuitive navigation.
- Swipe Up/Down: Scroll through menus and notifications.
- Swipe Left/Right: Access quick functions or different data screens.
- Tap: Select an item or confirm an action.
- Side Button: Press to return to the home screen or wake the device.

Figure 3.1: The smartwatch display showing various application icons for easy access to features.
3.2 Bluetooth Calling
The Mibro C3 Smartwatch allows you to make and receive calls directly from your wrist, thanks to its two-in-one Bluetooth chip.
- Answering Calls: When a call comes in, tap the green phone icon on the watch screen to answer.
- Making Calls: Access the dial pad or contact list on the watch to initiate a call.
- Rejecting Calls: Tap the red phone icon to reject an incoming call.

Figure 3.2: A user interacting with the smartwatch to answer a call, highlighting the convenience of wrist-based communication.
3.3 Smart Notifications
Receive real-time notifications from your smartphone directly on your Mibro C3 Smartwatch.
- Ensure the Mibro Fit App has notification permissions enabled on your phone.
- Supported notifications include calls, SMS, Gmail, Skype, Twitter, Facebook, WhatsApp, Instagram, VK, Snapchat, and more.
- Note: You cannot reply to messages directly from the watch.

Figure 3.3: The smartwatch displaying icons for various mobile applications, indicating support for smart notifications.
3.4 Health Monitoring
The Mibro C3 Smartwatch provides comprehensive health tracking features.
- Heart Rate Monitoring: Equipped with an updated 4 PD heart rate sensor, it monitors your heart rate continuously throughout the day.
- SpO2 Measurement: Measure your blood oxygen saturation levels.
- Sleep Monitoring: Tracks your sleep patterns and provides analysis of sleep time and quality.
- Female Cycle Tracking: Supports tracking for female physiological cycles.
All health data can be synchronized to the Mibro Fit App for detailed analysis and historical trends.

Figure 3.4: Close-up of the smartwatch's rear, showing the 4PD heart rate sensor, alongside illustrations of heart rate, SpO2, and sleep monitoring in action.
3.5 Sport Modes
The watch supports 70 sport modes to accurately track your workouts.
- Select your desired sport mode from the watch's menu before starting an activity.
- The watch records data such as steps, distance, and calorie consumption.
- When paired with your phone's GPS, it can generate a trajectory chart for your outdoor exercises.

Figure 3.5: The smartwatch being worn during a cycling activity, demonstrating its sport tracking capabilities.
3.6 Life Assistant Features
The Mibro C3 Smartwatch offers several convenient life assistant functions:
- Music control and playback
- Stress monitoring and breathing training
- Calendar, alarm clock, weather
- Shake camera (remote camera control)
- Watch search, do not disturb mode, power saving mode
- Sedentary reminder, timer, calculator, stopwatch
- Screen lock, password setting

Figure 3.6: The smartwatch displaying a dynamic dial with a fireworks animation, illustrating customizable watch faces.
4. Maintenance
4.1 Cleaning Your Smartwatch
To maintain the performance and appearance of your Mibro C3 Smartwatch:
- Wipe the screen and body with a soft, lint-free cloth.
- For stubborn stains, slightly dampen the cloth with water.
- Avoid using harsh chemicals or abrasive materials.
- Regularly clean the charging contacts on the back of the watch to ensure proper charging.
4.2 Water Resistance (2ATM)
The Mibro C3 Smartwatch is rated 2ATM waterproof, meaning it can withstand pressures equivalent to a depth of 20 meters. This makes it suitable for:
- Washing hands
- Rain
- Shallow swimming
Important Note:
- Do not wear the watch during scuba diving, surfing, hot springs, or other activities involving high-velocity water or hot water.
- Water resistance is not a permanent condition and may diminish over time with normal wear and tear.

Figure 4.1: The smartwatch being worn by a person in a swimming pool, demonstrating its 2ATM water resistance for activities like swimming.
4.3 Battery Life Optimization
To maximize the battery life of your Mibro C3 Smartwatch:
- Adjust screen brightness to a lower setting.
- Disable unnecessary notifications.
- Limit continuous heart rate monitoring if not needed constantly.
- Utilize the power saving mode when available.
5. Troubleshooting
If you encounter issues with your Mibro C3 Smartwatch, try the following solutions:
| Problem | Possible Solution |
|---|---|
| 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. |
| Unable to pair with phone | Make sure Bluetooth is enabled on your phone. Restart both the watch and your phone. Ensure the Mibro Fit App is updated to the latest version. Forget the device in your phone's Bluetooth settings and try pairing again. |
| Inaccurate health data | Ensure the watch is worn snugly on your wrist, not too tight or too loose. Clean the sensors on the back of the watch. Avoid excessive movement during measurements. |
| Notifications not appearing | Check notification permissions for the Mibro Fit App in your phone's settings. Ensure the app is running in the background. Verify that 'Do Not Disturb' mode is not active on the watch or phone. |
| Short battery life | Reduce screen brightness, disable continuous heart rate monitoring, and limit background app refresh. Refer to Section 4.3 for more tips. |
6. Specifications
| Feature | Detail |
|---|---|
| Model | C3 |
| Screen Size | 1.85 Inches HD Touch Screen |
| Water Resistance | 2ATM |
| Battery Capacity | 350mAh |
| Battery Life (Daily Mode) | Up to 10 days |
| Battery Life (Basic Mode) | Up to 50 days |
| Connectivity | Bluetooth (Dual-mode chip) |
| Operating System | RTOS |
| Compatibility | iOS 10.0 and above, Android 5.0 and above |
| Health Monitoring | Heart Rate (4 PD sensor), SpO2, Sleep, Female Cycle |
| Sport Modes | 70 modes |
| Included Components | Charging Cable |
| Item Weight | 1.53 ounces (43.5 Grams) |
| Manufacturer | Mibro |
7. Warranty and Support
Mibro products are manufactured to the highest quality standards. For information regarding warranty coverage, please refer to the warranty card included with your product or visit the official Mibro website. If you experience any issues or require technical assistance, please contact Mibro customer support through their official channels.
For the latest updates, FAQs, and support resources, please visit the Mibro official website or contact their customer service team.






