1. Setup and Initial Use
1.1 Package Contents
Verify that all items are present in your package:
- 1 x SOUYIE Smart Watch KW350C
- 1 x Charging Cable
- 1 x Watch Band
- 1 x User Manual
1.2 Initial Charging
Before first use, fully charge your SOUYIE Smart Watch. Connect the magnetic charging cable to the charging port on the back of the watch and plug the USB end into a compatible power adapter (not included). The watch display will indicate charging status.

Image: The SOUYIE Smart Watch KW350C connected to its magnetic charging cable, displaying a full battery. This illustrates the charging process and the watch's robust battery life.
1.3 App Installation and Pairing
To unlock the full functionality of your smart watch, download the HaWoFit application on your smartphone. The app is compatible with iOS 9.0+ and Android 8.0+ devices.
- Scan the QR code in the manual or on the watch screen (if available) or search for "HaWoFit" in your phone's app store.
- Install and open the HaWoFit app.
- Follow the on-screen instructions in the app to create an account and pair your watch via Bluetooth. Ensure Bluetooth is enabled on your smartphone.
2. Operating Instructions
2.1 Display and Navigation
The KW350C features a 1.43-inch AMOLED display with 466x466 HD resolution and up to 1000 nits peak brightness for clear visibility. Navigate the watch using the touchscreen and the physical buttons on the side.

Image: A detailed view of the SOUYIE Smart Watch KW350C's display, emphasizing its durable Panda Glass and vibrant AMOLED screen with a compass watch face.
Watch Faces and Always-On Display (AOD)
Customize your watch face from over 280 cloud options, or create your own using photos and videos. The watch supports an Always-On Display (AOD) feature, which can be configured for duration and style (digital or pointer). Note that AOD increases battery consumption.

Image: A collection of diverse watch faces available for the SOUYIE Smart Watch KW350C, demonstrating customization options.

Image: The SOUYIE Smart Watch KW350C showcasing its 24-hour Always-On Display (AOD) feature, with options for screen duration and dial types.
2.2 Smart Calling and Notifications
Connect your watch to your smartphone via Bluetooth 5.4 to make and receive calls directly from your wrist. The dual-mic noise reduction ensures clear audio even in noisy environments. You can sync up to 150 contacts and receive instant notifications from messaging apps like WhatsApp and SMS.

Image: The SOUYIE Smart Watch KW350C showing icons for phone calls, contacts, SMS, and SOS, illustrating its intelligent noise reduction call feature.

Image: The SOUYIE Smart Watch KW350C displaying a message notification, demonstrating its smart message reminder function.
SOS Emergency Function
Long-press the designated button to activate the SOS function, which alerts emergency contacts and triggers a red warning light for safety.
2.3 GPS and Offline Maps
The watch features built-in standalone GPS and supports 6 satellite systems for accurate positioning without a phone. Download offline topographic maps to navigate and review terrain at any time. The GPS tracking error is less than 2.8% (Savi P08 Pro certified).

Image: The SOUYIE Smart Watch KW350C showing a navigation map with a red line indicating a route and a 'Deviate' warning, highlighting its precise navigation and offline map capabilities.
Video: This video demonstrates the procedure for downloading offline maps onto the SOUYIE Smart Watch KW350C, ensuring navigation is available without a network connection.
Video: This video illustrates the GPS operation procedure on the SOUYIE Smart Watch KW350C, showing how to use its standalone GPS for tracking activities.
2.4 Sports Modes and Activity Tracking
The watch offers 178 professional sports modes, including mountaineering, skiing, diving, and surfing. It automatically recognizes sports functions and tracks distance, stroke count, and calories burned. The built-in barometer monitors altitude, and the compass helps maintain orientation during outdoor activities.

Image: A man engaged in cycling, wearing the SOUYIE Smart Watch KW350C, demonstrating the watch's extensive range of over 178 sports modes.

Image: A man rock climbing, wearing the SOUYIE Smart Watch KW350C, which displays compass, altitude, and barometer readings, essential for outdoor adventures.
2.5 Health Monitoring
The HX3691 sensor provides 24-hour monitoring of heart rate, blood oxygen (SpO2), and stress levels. It also tracks sleep quality throughout the day, including naps, and offers women's health tracking and PAI vitality index. All health data can be synced to your phone for detailed review.

Image: A man exercising with weights, wearing the SOUYIE Smart Watch KW350C, which displays health metrics like heart rate, blood oxygen, stress, and sleep quality via its multi-channel optical sensor.

Image: The SOUYIE Smart Watch KW350C showing detailed sleep tracking data, indicating its capability as a 24/7 sleep monitor for both deep and light sleep.
2.6 AI Smart Assistant and Voice Control
The watch integrates an AI smart assistant for hands-free control. It can generate personalized fitness plans, travel tips, and daily workout reports. It also supports 24-language real-time translation and features 4GB of storage for one-tap voice recording of lectures or meetings.

Image: The SOUYIE Smart Watch KW350C showing an 'AI Q&A' screen with a voice assistant prompt, demonstrating its smart AI capabilities.

Image: A man wearing the SOUYIE Smart Watch KW350C, accompanied by text detailing its AI Smart Life features, including voice-generated fitness plans, travel guides, and 24-language real-time translation.
2.7 Additional Features
The KW350C includes a variety of other useful functions:
- Built-in LED Flashlight: Provides convenient lighting with variable intensity and red safety lights.
- Music Player: Control music playback from your wrist.
- Games: Access to various games.
- Calculator, Weather, World Clock, Alarm Clock, Pedometer.
- Camera Control: Remotely control your phone's camera.
- Password Lock: Secure your watch data.
- Find Watch: Locate your watch if misplaced.
- Digital Wallet: For compatible payment methods.

Image: The SOUYIE Smart Watch KW350C displaying a comprehensive menu of general functions, including telephone, contacts, weather, music, and offline maps, showcasing its versatility.

Image: A man activating the built-in LED flashlight on his SOUYIE Smart Watch KW350C, demonstrating its utility for convenient lighting.
3. Maintenance
3.1 Water Resistance
The SOUYIE KW350C is 5ATM waterproof, meaning it can withstand water pressure equivalent to a depth of 50 meters. This makes it suitable for swimming (freestyle, breaststroke, backstroke) and other water activities. After swimming, the watch features an auto water-drain function to keep the sensor dry.

Image: Two divers exploring underwater, illustrating the 5ATM waterproof capability of the SOUYIE Smart Watch KW350C, suitable for various water activities.
3.2 Cleaning and Care
To maintain your watch, regularly clean the screen and sensors with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials. If the watch comes into contact with saltwater, rinse it with fresh water and dry thoroughly.
3.3 Battery Management
The 550mAh battery provides 10-21 days of regular use and over 30 days on standby. A full charge takes approximately 2 hours. To extend battery life, enable power-saving mode or adjust settings such as screen brightness and Always-On Display duration.

Image: The SOUYIE Smart Watch KW350C connected to its charger, emphasizing its 21-day ultra-long battery life and quick charging capabilities.
4. Troubleshooting
If you encounter issues with your SOUYIE Smart Watch KW350C, refer to the following common solutions:
| Problem | Possible Solution |
|---|---|
| Watch not turning on or charging | Ensure the charging cable is securely connected to both the watch and a working power source. Clean the charging contacts on the watch and cable. Allow the watch to charge for at least 30 minutes before attempting to power it on. |
| Unable to pair with smartphone | Ensure Bluetooth is enabled on your phone and the watch. Make sure the watch is within range of your phone. Restart both the watch and your phone. Try unpairing and re-pairing through the HaWoFit app. |
| Inaccurate GPS readings | Ensure you are in an open area with a clear view of the sky. Allow the watch a few minutes to acquire a strong GPS signal. Update offline maps if necessary through the HaWoFit app. |
| Inaccurate heart rate/SpO2/stress readings | Ensure the watch is worn snugly on your wrist, one finger-width above the wrist bone. The sensor should be clean and in direct contact with your skin. Avoid excessive movement during measurements. |
| Short battery life | Disable Always-On Display (AOD). Reduce screen brightness. Limit frequent GPS usage. Enable power-saving mode in the watch settings. Close unnecessary background apps on the watch. |
| Notifications not appearing | Check Bluetooth connection. Ensure notification permissions are granted to the HaWoFit app on your phone. Verify notification settings within the HaWoFit app and on the watch. Disable 'Do Not Disturb' mode on the watch. |
5. Specifications
Key technical specifications for the SOUYIE Smart Watch KW350C:
| Feature | Detail |
|---|---|
| Model Name | KW350C |
| Brand | SOUYIE |
| Display Type | AMOLED |
| Screen Size | 1.43 Inches |
| Resolution | 466 x 466 |
| Maximum Display Brightness | 1000 Nit |
| Operating System | Android iOS Compatible |
| Memory Storage Capacity | 4 GB |
| Connectivity Technology | Bluetooth 5.4 |
| GPS | Built-in GPS (BeiDou, GLONASS, GPS, Galileo) |
| Water Resistance Level | 5ATM (50 Meters) |
| Battery Capacity | 550 Milliamp Hours |
| Battery Charge Time | 2 Hours |
| Typical Battery Life | 10-21 Days |
| Sensors | HX3691 (Heart Rate, Blood Oxygen, Stress), Barometer, Compass |
| Sports Modes | 178+ |
| Case Material | Zinc Alloy |
| Band Material | Resin |
| Item Weight | 81 Grams |
6. Warranty and Support
6.1 Warranty Information
The SOUYIE Smart Watch KW350C comes with a 3-year manufacturer's warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
6.2 Return Policy
A hassle-free 30-day return policy is offered for all buyers. Refer to your retailer's specific return guidelines for details.
6.3 Customer Support
For technical assistance, warranty claims, or any questions regarding your SOUYIE Smart Watch KW350C, please contact SOUYIE-US customer support. Contact details can typically be found on the official SOUYIE website or through your purchase platform.







