1. Introduction
Thank you for choosing the Cillso S27 Smartwatch. This manual provides essential information for setting up, operating, and maintaining your device. Please read it carefully to ensure optimal performance and longevity of your smartwatch.
2. Package Contents
The Cillso S27 Smartwatch package typically includes:
- Cillso S27 Smartwatch
- Charging Cable
- User Manual
3. Setup
3.1. Charging the Smartwatch
Before initial use, fully charge your smartwatch. Connect the magnetic charging cable to the charging contacts on the back of the watch and plug the USB end into a power adapter (not included) or a computer's USB port. A full charge typically takes approximately 1.5 hours and provides up to 7 days of active use or 30 days of standby time.

Image: Smartwatch charging process and battery life indicators.
3.2. App Installation and Pairing
To utilize all features of your Cillso S27 Smartwatch, you need to install the companion application on your smartphone. The app is compatible with iOS 9.0 or higher and Android 4.4 or higher, and requires Bluetooth 4.0 or higher.
- Scan the QR code in the manual or on the watch screen (if available) to download the app, or search for the app name (usually indicated in the quick start guide) in your phone's app store.
- Install and open the app.
- Ensure Bluetooth is enabled on your smartphone.
- In the app, navigate to the 'Device' or 'My Watch' section and select 'Add Device'.
- Select 'S27' from the list of available devices.
- Confirm the pairing request on both your phone and the smartwatch.
4. Operating the Smartwatch
4.1. Basic Navigation
The Cillso S27 Smartwatch features a 1.3-inch high-definition color display with high touch sensitivity. You can adjust the screen brightness to one of four levels for optimal visibility.

Image: Smartwatch screen showing weather and music control interface.
- Swipe Down: Access quick settings (e.g., brightness, do not disturb).
- Swipe Up: View notifications.
- Swipe Left/Right: Navigate through main functions (e.g., activity data, heart rate, weather, music control).
- Press Side Button: Return to the main watch face or turn the screen on/off.
4.2. Customizing Watch Faces
The smartwatch offers a variety of pre-installed watch faces. You can also customize the watch face by uploading your favorite photos through the companion app, allowing you to personalize the display to match your style.

Image: Custom watch face options and multiple dial styles.
5. Key Features
5.1. Health Monitoring
The Cillso S27 Smartwatch provides comprehensive health tracking features:
- 24-Hour Heart Rate Monitoring: Continuously tracks your heart rate throughout the day.
- Sleep Monitoring: Analyzes your sleep patterns, including deep sleep, light sleep, and awake times, to help improve sleep quality.
- Blood Oxygen (SpO2) and Blood Pressure Monitoring: Intelligently measures your blood oxygen levels and blood pressure.
- Activity Tracking: Records calories burned, distance covered, and active minutes.

Image: Heart rate monitoring during exercise and sleep tracking.
5.2. Sport Modes
The smartwatch supports 24 different sport modes, including running, basketball, football, swimming, cycling, walking, and more. It records real-time data during your workouts, providing valuable reference data for your daily health analysis.

Image: Overview of 24 sport modes and activity tracking.
5.3. Notifications
Receive notifications for calls, messages, and alerts from various social media applications (e.g., Facebook, Twitter, WhatsApp, Instagram, Messenger, LinkedIn, Skype) directly on your wrist through intuitive and customizable vibrations. You can also view incoming calls and reject them if you are busy.
5.4. IP68 Waterproof Rating
The Cillso S27 Smartwatch has an IP68 waterproof rating, meaning it is resistant to dust and can withstand immersion in water up to 1.5 meters for 30 minutes. This allows you to wear it while washing hands, bathing, or swimming without concern for water infiltration.

Image: Smartwatch demonstrating IP68 professional waterproof capability.
6. Maintenance
- Cleaning: Regularly clean the watch and strap with a soft, dry cloth. If necessary, use a slightly damp cloth and mild soap, then dry thoroughly.
- Charging: Use only the provided charging cable. Avoid using damaged cables or chargers.
- Water Exposure: While IP68 rated, avoid prolonged exposure to hot water, steam, or corrosive liquids, as this may compromise the seal. After swimming, rinse the watch with fresh water and dry it.
- Storage: Store the smartwatch in a cool, dry place when not in use. Avoid extreme temperatures.
7. Troubleshooting
| Issue | Possible Solution |
|---|---|
| Smartwatch does not turn on | Ensure the watch is fully charged. Press and hold the side button for several seconds. |
| Cannot pair with smartphone | Ensure Bluetooth is enabled on your phone. Restart both the watch and phone. Make sure the app is installed and open. Check if the watch is already paired with another device. |
| Inaccurate health data | Ensure the watch is worn snugly on your wrist, not too tight or too loose. Clean the sensor on the back of the watch. Data is for reference and not for medical use. |
| Notifications not received | Check app notification settings on your phone and within the smartwatch app. Ensure the watch is connected via Bluetooth. Disable 'Do Not Disturb' mode on the watch. |
| Short battery life | Reduce screen brightness. Turn off continuous heart rate monitoring if not needed. Limit frequent notifications. Ensure the watch is fully charged. |
8. Specifications
- Brand: Cillso
- Model Number: S27
- Screen Size: 1.3 Inches
- Operating System: Android (compatible)
- Connectivity: Bluetooth
- Special Features: Time display, Pedometer, Sedentary reminder, Alarm clock, Heart Rate Monitor, Sleep Monitor, SpO2, Blood Pressure
- Compatible Devices: Smartphone, Tablet (iOS 9.0+/Android 4.4+, Bluetooth 4.0+)
- Battery Composition: Lithium-polymer
- Battery Capacity: 260 mAh
- Battery Life: Up to 7 days (working), 30 days (standby)
- Charging Time: Approximately 1.5 hours
- Water Resistance: IP68
- Color: Black
9. Warranty and Support
For warranty information and customer support, please refer to the documentation provided with your purchase or contact Cillso customer service through the official website or your retailer. Keep your purchase receipt as proof of purchase.




