1. Introduction
This manual provides detailed instructions for the Bambooinn C28 Smartwatch. Please read it carefully to ensure proper use and maintenance of your device.

Image 1.1: Bambooinn C28 Smartwatch. The image displays the smartwatch from two angles, highlighting its robust design and digital interface. One view shows the watch face with time, date, steps, calories, and heart rate. The other view shows an incoming call screen with a phone number.
2. Package Contents
- Bambooinn C28 Smartwatch
- Charging Cable
- User Manual
3. Setup
3.1 Initial Charging
Before first use, fully charge your smartwatch. Connect the magnetic charging cable to the charging port on the back of the watch and plug the USB end into a power adapter (not included).

Image 3.1: Smartwatch Charging. The image shows the Bambooinn C28 Smartwatch connected to its magnetic charging cable, with a battery icon indicating 100% charge. Text highlights a 2.5-hour charging time and extended standby duration.
A full charge takes approximately 2.5 hours.
3.2 App Installation and Pairing
- Download the "Da Fit" application from your smartphone's app store (iOS or Android).
- Open the "Da Fit" app and follow the on-screen instructions to create an account or log in.
- Enable Bluetooth on your smartphone.
- In the "Da Fit" app, search for your Bambooinn C28 Smartwatch and pair it.
- Once connected, the watch's language will automatically synchronize with your phone's language settings. If not, you can manually adjust the language within the "Da Fit" app.
4. Operating Instructions
4.1 Basic Navigation
- Touch Screen: Swipe left/right, up/down to navigate through menus and features. Tap to select.
- Side Buttons: Use the physical buttons on the side for quick access to functions like power on/off, back, or sport modes.
4.2 Bluetooth Calls and Notifications
Once paired with the "Da Fit" app, you can make and receive calls directly from your smartwatch. You will also receive notifications from social media applications (e.g., Facebook, WhatsApp, Instagram) and SMS messages.

Image 4.1: Bluetooth Call and Message Reminders. This image illustrates the smartwatch's capability to handle Bluetooth calls and display notifications from various social media platforms and messaging apps, shown alongside a smartphone interface.
4.3 Health Monitoring (24/7)
The smartwatch is equipped with sensors to monitor various health metrics in real-time:
- Heart Rate: Continuous heart rate tracking.
- SpO2: Blood oxygen saturation levels.
- Blood Pressure: Blood pressure monitoring.
- Stress Level: Tracks your stress levels throughout the day.
- Sleep Monitoring: Analyzes sleep duration and quality (REM, light, deep sleep, wake-up times).

Image 4.2: Health Monitoring. This image illustrates the smartwatch interface displaying graphs for heart rate, blood oxygen, and blood pressure, indicating its 24/7 health monitoring capabilities.

Image 4.3: Sleep Monitoring. The image displays the smartwatch's sleep tracking feature, breaking down sleep into REM, light, deep, and wake-up periods with durations and percentages.
4.4 Sport Modes
The Bambooinn C28 Smartwatch supports over 100 sport modes, including running, hiking, cycling, and football. You can select your desired workout mode via the "Da Fit" app.

Image 4.4: 100+ Sport Modes. This image showcases the smartwatch's extensive range of sport modes, with icons representing different activities and a display showing activity duration, steps, calories, and heart rate.
4.5 Other Functions
The smartwatch offers additional features for convenience:
- Voice Assistant: Interact with your watch using voice commands.
- Weather Forecast: View current weather conditions.
- Alarm Clock: Set alarms directly from your wrist.
- Music Control: Control music playback on your connected smartphone.
- Camera Control: Remotely trigger your smartphone's camera.
- Calendar: Access your schedule.
- Calculator: Perform basic calculations.
- Find Phone: Locate your paired smartphone.
- Custom Watch Faces: Personalize your watch face with various designs available in the app.
5. Maintenance
5.1 Wearing the Watch
Ensure the watch is worn neither too tightly nor too loosely for accurate health monitoring and comfort.
5.2 Cleaning
Regularly clean the watch and strap with a soft, dry cloth. Avoid using harsh chemicals.
5.3 Strap Replacement
The watch features a removable strap, allowing for customization with other compatible straps.
5.4 Water Resistance
The Bambooinn C28 Smartwatch is 5 ATM waterproof and IP69 rated, suitable for swimming up to 50 meters deep. It is resistant to shocks, impacts, and dust, and operates reliably in temperatures from -30°C to 70°C. However, avoid prolonged exposure to hot water or steam (e.g., hot showers, saunas) as this can compromise the seals.

Image 5.1: Military-Grade Durability. This image highlights the smartwatch's robust construction, showcasing its resistance to cold, heat, water (IP68 is shown in the image, while the product description states IP69 and 5 ATM), and impact, certified to MIL-STD 810G-516.6 standards.
6. Troubleshooting
6.1 Language Mismatch
If the watch language does not match your phone's language after pairing, open the "Da Fit" app and manually set the desired language within the app settings.
6.2 Connection Issues
- Ensure Bluetooth is enabled on your smartphone.
- Make sure the "Da Fit" app is running in the background.
- Restart both your smartphone and the smartwatch.
- Try unpairing and re-pairing the device through the "Da Fit" app.
6.3 Inaccurate Health Data
- Ensure the watch is worn correctly, neither too tight nor too loose, and positioned properly on your wrist.
- Clean the sensors on the back of the watch.
- Environmental factors or movement during measurement can affect accuracy.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Bambooinn |
| Model Number | C28 (6976048062659) |
| Display Size | 2.02 inches HD (320 x 390 PPI) |
| Connectivity | Bluetooth |
| Battery Capacity | 410 mAh |
| Charging Time | Approx. 2.5 hours |
| Battery Life (Low Power Mode) | 25-30 days |
| Water Resistance | 5 ATM, IP69 |
| Operating Temperature | -30°C to 70°C |
| Memory Storage Capacity | 128 MB |
| Dimensions (L x W x H) | 6 x 2 x 8 cm |
8. Warranty and Support
- Warranty: 3-year warranty for your purchase.
- Online Consultation: 24/7 online support available.
- Returns & Exchanges: 30 days for free returns and exchanges.

Image 8.1: Bambooinn Warranty Details. This image displays the Bambooinn warranty information, including a 3-year warranty, 24/7 online consultation, and 30-day free returns and exchanges.




