1. Introduction
This manual provides detailed instructions for the setup, operation, and maintenance of your FirYawee Smart Watch (Models S48H and S45K). Please read this manual thoroughly before using your device to ensure proper function and to maximize your user experience.
1.1 Package Contents
Upon unpacking, please verify that all items listed below are present and in good condition:
- FirYawee Smart Watch (S48H or S45K)
- USB Charging Cable
- User Manual

Image: FirYawee Smart Watch S48H S45K, gray color, displaying time and heart rate.
2. Setup
2.1 Charging the Device
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 standard USB power adapter (not included) or a computer's USB port.
- Charging Time: Approximately 2 hours for a full charge.
- Battery Life: Up to 7-10 days of normal use, 10-30 days standby time.

Image: FirYawee Smart Watch S48H S45K with magnetic charging cable connected to its back, showing charging icon on screen.
2.2 App Installation and Pairing
To unlock the full functionality of your smartwatch, you need to install the companion application on your smartphone and pair the devices.
- Download the App: Scan the QR code provided in the manual or on the watch screen (if available) or search for the official FirYawee app in your smartphone's app store (Apple App Store for iOS, Google Play Store for Android).
- Create Account: Open the app and follow the on-screen instructions to create an account or log in.
- Enable Bluetooth: Ensure Bluetooth is enabled on your smartphone.
- Pair the Watch: In the app, navigate to the device pairing section. Select your FirYawee Smart Watch from the list of available devices. Confirm the pairing request on both your phone and the watch.
- Grant Permissions: Allow necessary permissions (e.g., notifications, location, contacts) for the app to function correctly.
System Requirements: iOS 9.0 or above / Android 5.0 or above.
3. Operating Instructions
3.1 Basic Navigation
- Touchscreen: Swipe left/right, up/down to navigate through menus and features. Tap to select.
- Side Buttons: The watch features side buttons (e.g., "HOME", "SPORT") for quick access to specific functions or to return to the home screen.

Image: FirYawee Smart Watch S48H S45K displaying a watch face with time and date, showing the side buttons labeled 'HOME' and 'SPORT'.
3.2 Call Functions
Once paired via Bluetooth, your smartwatch supports making and answering calls directly from your wrist.
- Answering Calls: When an incoming call is received, tap the green answer icon on the watch screen.
- Making Calls: Access the phone function on your watch to dial numbers or select contacts synchronized from your phone.
- Built-in Mic & Speaker: The watch is equipped with a microphone and speaker for hands-free communication.

Image: FirYawee Smart Watch S48H S45K displaying an incoming call screen with options to answer or decline, alongside a diagram showing call features like dial pad, recent calls, and contacts.
3.3 Message Notifications
Receive notifications for SMS messages and various social media applications directly on your watch. Ensure app permissions are granted for notifications.

Image: FirYawee Smart Watch S48H S45K displaying message notifications, with various app icons like SMS, YouTube, WhatsApp, Facebook, and TikTok shown in the background.
3.4 Health Monitoring
The smartwatch provides comprehensive health monitoring features.
- Heart Rate Monitor: Tracks your heart rate continuously throughout the day. View real-time data on the watch or detailed trends in the app.
- Blood Oxygen (SpO2) Monitor: Measures your blood oxygen saturation levels. Regular monitoring can help understand your respiratory health.
- Sleep Monitor: Records your sleep patterns, including deep sleep, light sleep, and awake times. Analyze your sleep quality in the app to improve rest.
- Stress Monitor: Calculates your stress level based on heart rate and blood oxygen data, along with personal metrics.

Image: FirYawee Smart Watch S48H S45K displaying health monitoring data including heart rate (102 bpm), SpO2 (96%), and stress level (70, medium).
3.5 Activity Tracking (100+ Sport Modes)
Track your daily activities and workouts with over 100 sport modes. The watch records steps, calories burned, distance, and exercise duration.
- Sport Modes: Select from various activities like running, walking, cycling, swimming, yoga, basketball, and more.
- Data Analysis: View detailed workout summaries and progress in the companion app.

Image: FirYawee Smart Watch S48H S45K displaying activity tracking data including steps, calories, and exercise time, with icons for over 100 sport modes.
3.6 AI Voice Assistant
Interact with your smartphone's AI voice assistant directly from your watch. Tap the AI voice icon and speak your commands (e.g., "Call John," "Play music," "How is the weather today?").

Image: FirYawee Smart Watch S48H S45K showing the AI voice assistant interface, with a smartphone displaying a voice command prompt.
3.7 Music and Camera Control
- Music Control: Control music playback on your smartphone (play, pause, skip tracks) directly from your watch.
- Camera Control: Use your watch as a remote shutter for your smartphone's camera, ideal for group photos or selfies.

Image: FirYawee Smart Watch S48H S45K displaying music control interface and camera shutter icon, with images of a person listening to music and another taking a photo with a smartphone.
3.8 Other Features
- Weather Display: Get real-time weather updates on your watch when connected to your phone.
- Alarm: Set alarms directly from your watch.
- Stopwatch & Timer: Utilize built-in stopwatch and timer functions.
- Flashlight: Activate a basic flashlight function on the watch screen.
- Brightness Adjustment: Adjust screen brightness for optimal viewing.
- Sedentary Reminder: Receive alerts to stand up and move after periods of inactivity.
- Drink Water Reminder: Get reminders to stay hydrated throughout the day.
- Customizable Watch Faces: Choose from a variety of pre-installed watch faces or customize with your own photos via the app.

Image: FirYawee Smart Watch S48H S45K displaying various customizable watch faces, including options to use personal photos.
4. Maintenance
4.1 Water Resistance (IP68)
Your FirYawee Smart Watch is IP68 rated, meaning it is resistant to dust and can withstand immersion in water up to 1.5 meters for up to 30 minutes. It is suitable for daily use, hand washing, and light rain. It features a built-in drainage system to help remove water.
- Note: Not suitable for hot water baths, saunas, or deep diving. Avoid prolonged exposure to water.

Image: FirYawee Smart Watch S48H S45K submerged in water, illustrating its IP68 waterproof rating, with icons for waterproof, dustproof, anti-corrosion, and anti-impact features.
4.2 Cleaning and Care
- Wipe the watch regularly with a soft, dry cloth.
- If necessary, use a slightly damp cloth for cleaning, then dry thoroughly.
- Avoid using harsh chemicals or abrasive materials.
- Keep the charging contacts clean and dry to ensure efficient charging.
5. Troubleshooting
| Problem | Possible Solution |
|---|---|
| Watch does not turn on. | Ensure the watch is fully charged. Connect it to the charger for at least 30 minutes. |
| Cannot pair with smartphone. |
|
| Notifications are not received. |
|
| Inaccurate health data. |
|
6. Specifications
| Feature | Detail |
|---|---|
| Model Name | S48H, S45K |
| Brand | FirYawee |
| Screen Size | 1.39 Inches |
| Shape | Round |
| GPS | True |
| Battery Type | Lithium Polymer (250mAh) |
| Connectivity | Bluetooth |
| Special Features | Bluetooth Calls, Notifications, AI Voice Assistant |
| Operating System | Android, iOS compatible |
| Waterproof Rating | IP68 |
| Product Dimensions | 6.1 x 2.95 x 0.91 inches |
| Item Weight | 2.89 ounces |
7. Safety Information
- Do not attempt to disassemble or modify the device.
- Keep the device away from extreme temperatures and direct sunlight.
- Avoid exposing the device to strong impacts or drops.
- Consult a medical professional before starting any new exercise regimen or if you have health concerns. The health data provided by this device is for reference only and should not be used for medical diagnosis or treatment.
- Keep out of reach of children.
8. Warranty and Support
For warranty information, technical support, or customer service inquiries, please refer to the contact information provided on the product packaging or the official FirYawee website. Please retain your proof of purchase for warranty claims.