1. Introduction
The LEADOYS C25 Smartwatch is a robust and feature-rich device designed for active lifestyles. It boasts a vibrant 1.43-inch AMOLED display, 1ATM depth waterproofing, comprehensive health monitoring, and convenient Bluetooth call functionality. This manual will guide you through the setup, operation, and maintenance of your new smartwatch.
2. Getting Started: Setup
2.1 Package Contents
Before you begin, please ensure all items are present in your package:
- LEADOYS C25 Smartwatch
- Charging Cable
- User Manual (this document)
2.2 Charging the Smartwatch
For optimal performance, fully charge your smartwatch before first use.
- Connect the magnetic charging cable to the charging contacts on the back of the smartwatch.
- Plug the USB end of the cable into a standard USB power adapter (5V/1A recommended) or a computer's USB port.
- The watch display will indicate charging status. A full charge typically takes approximately 2 hours.
2.3 App Download and Pairing
To unlock the full potential of your C25 Smartwatch, download and connect it to the companion app.
- Download the App: Search for "Da Fit" in your smartphone's app store (iOS App Store or Google Play Store) and install it. The app supports OS version 9.0 and above.
- Enable Bluetooth: Ensure Bluetooth is enabled on your smartphone.
- Open the App: Launch the "Da Fit" app and follow the on-screen instructions to create an account or log in.
- Add Device: In the app, navigate to the device section (usually indicated by a watch icon or "Add Device").
- Select Your Watch: The app will scan for nearby devices. Select "C25" from the list.
- Confirm Pairing: A pairing request will appear on your watch and phone. Confirm the pairing on both devices.

3. Operating Your Smartwatch
3.1 Basic Navigation
The C25 Smartwatch features a responsive touchscreen and physical buttons for navigation.
- Swipe Up/Down: Scroll through menus and notifications.
- Swipe Left/Right: Access quick widgets or different watch faces.
- Tap: Select an item or confirm an action.
- Side Buttons: Typically used for power on/off, returning to the home screen, or quick access to sports modes.
3.2 Customizing Watch Faces
Personalize your smartwatch with a variety of watch faces.
- From the home screen, long-press the display to enter watch face selection mode.
- Swipe left or right to browse available watch faces.
- Tap to select your desired watch face.
- More watch faces can be downloaded via the Da Fit app.

3.3 Bluetooth Call Functionality
Make and receive calls directly from your wrist.
- Ensure your watch is connected to your phone via Bluetooth.
- When an incoming call arrives, the watch will display the caller ID.
- Tap the green icon to answer or the red icon to reject the call.
- You can also dial numbers directly from the watch's call interface.

3.4 Notifications
Receive notifications from your smartphone apps.
- Enable app notifications in the Da Fit app settings.
- Supported apps include WeChat, QQ, Facebook, Twitter, Instagram, Skype, WhatsApp, Line, Kakao Talk, and SMS.
- Swipe up on the watch face to view recent notifications.
3.5 Voice Assistant
Access your phone's voice assistant directly from your watch.
- Ensure your watch is connected to your phone.
- Activate the voice assistant feature on your watch (refer to watch interface for specific gesture/button).
- Speak your commands, such as "Play my favorite music," "How is the weather tomorrow?" or "Turn on the alarm."

3.6 Health Monitoring
The C25 Smartwatch offers comprehensive health tracking features.
- Heart Rate Monitor: Tracks your heart rate 24/7 and alerts you to abnormal readings. Real-time data is saved and uploaded to the app.
- Blood Oxygen Monitoring (SpO2): Intelligently monitors blood oxygen saturation.
- Sleep Monitor: Scientifically monitors sleep patterns, analyzes sleep depth, and records real-time sleep data to help improve sleep habits.
- Women's Health Monitoring: Provides specific tracking for women's health.


3.7 Sports Modes
Track your workouts with over 100 sports modes.
- Access sports modes from the watch menu.
- Select your activity (e.g., Walk, Running, Outdoor Cycling, Jump Rope, Badminton, Basketball, Football, Swimming, Tennis, Rugby, Golf, Yoga, Gym, Dance, Bat ball, Elliptical machine, Rowing machine, Cross-country running, Snowboarding, Free training, Dummy bell, Abdominal curl, Climbing).
- The watch will record relevant data such as steps, calories, and activity duration.

3.8 Always-On Display
Keep the time visible at all times without needing to raise your wrist.
- The off-screen display needs to be manually turned on in the watch settings.
- Navigate to Settings > Off-screen display to configure.

4. Maintenance
4.1 Water Resistance and Durability
The C25 Smartwatch is built to withstand various harsh environments.
- Waterproof: 1ATM depth waterproof (up to 10 meters). Suitable for swimming, showering, and other water activities.
- Temperature Resistance: Passed low-temperature tests down to -40 degrees Celsius (anti-cold, antifreeze) and high-temperature resistance.
- Dust & Drop Resistance: Designed to cope with dust and drops, featuring scratch-resistant glass.


4.2 Cleaning and Care
- Wipe the watch regularly with a soft, damp cloth.
- Avoid using harsh chemicals or abrasive materials.
- Ensure the charging contacts are clean and dry before charging.
4.3 Battery Care
- Avoid fully discharging the battery frequently.
- Charge the watch regularly, even if not in daily use, to maintain battery health.
- Store the watch in a cool, dry place when not in use for extended periods.
5. Troubleshooting
If you encounter issues with your C25 Smartwatch, try the following steps:
- Watch not turning on: Ensure the watch is fully charged. Connect it to the charger for at least 30 minutes.
- Cannot pair with phone: Make sure Bluetooth is enabled on your phone and the watch is within range. Restart both the watch and your phone, then try pairing again through the Da Fit app.
- 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.
- Notifications not appearing: Check app notification settings in the Da Fit app and your phone's system settings to ensure permissions are granted.
- Short battery life: Reduce screen brightness, disable unnecessary features like continuous heart rate monitoring if not needed, and ensure no background apps are draining power.
If problems persist, consult the Da Fit app's help section or contact customer support.
6. Specifications
| Feature | Specification |
|---|---|
| Model | C25 Smartwatch |
| Brand | LEADOYS |
| Display Size | 1.43 inch AMOLED |
| Resolution | 466*466 pixels |
| CPU | RTL8763EWE_VP |
| Bluetooth Version | 5.2 |
| Battery Capacity | 410mAh |
| Battery Life (Typical) | 7-15 days (daily use) |
| Battery Life (Heavy Use) | 3-5 days |
| Battery Life (Standby) | Up to 100 days |
| Waterproof Grade | 1ATM (10m depth waterproof) |
| RAM | 128 MB |
| ROM | <128MB |
| Compatibility | All Compatible (Android OS 9.0+ / iOS 9.0+) |
| Dimensions (L x W x T) | 48.8mm x 48.8mm x 12.6mm |
| Total Length | Approx. 265mm |
| Voice Assistant | Yes |
| Metrics Measured | Heart Rate, Women's Health, Sleep |
| Activity Tracked | Steps, Calories, Activity |
| Functions | Shock Resistant, Passometer, Fitness Tracker, Sleep Tracker, Message Reminder, Call Reminder, Answer Call, Dial Call, Remote Control, Push Message, Alarm Clock, World Time, Calorie Counter, Heart Rate Tracker, Interactive Music, Calendar, Compass, Countdown |

7. User Tips
- Explore Watch Faces: Regularly check the Da Fit app for new watch faces to keep your smartwatch looking fresh.
- Optimize Battery: If you need to extend battery life, consider turning off the always-on display and reducing screen brightness.
- Stay Updated: Keep the Da Fit app and your smartwatch firmware updated to ensure you have the latest features and bug fixes.
- Wear Comfortably: For accurate health monitoring, ensure the watch is snug but comfortable on your wrist.
- Utilize Voice Assistant: Leverage the voice assistant for quick tasks like setting alarms, checking weather, or initiating calls without touching your phone.
8. Warranty and Support
For warranty information and customer support, please refer to the official LEADOYS website or contact your retailer. Keep your proof of purchase for any warranty claims.
9. Product Video
Watch this video for a visual demonstration of the LEADOYS C25 Smartwatch features and durability tests.





