1. Introduction
The LIGE GPS Smart Watch DM4-B is a versatile and robust wearable device designed for active individuals. It integrates advanced features such as a built-in GPS, compass, LED flashlight, and comprehensive health monitoring capabilities. With its durable IP68 waterproof rating and a wide array of sports modes, this smartwatch is suitable for various outdoor activities and daily use. The 1.43-inch AMOLED display provides clear visuals, and its long-lasting battery ensures reliable performance.

Figure 1: LIGE GPS Smart Watch DM4-B showcasing its design and display.
2. Safety Information
- This device is intended for general fitness and wellness purposes only. It is not a medical device and should not be used for medical diagnosis, treatment, or prevention of any disease. Consult a medical professional for any health concerns.
- The watch has an IP68 water resistance rating, suitable for swimming and daily water exposure. However, it is not recommended for diving, hot showers, or prolonged submersion in saltwater. Avoid exposing the watch to high-pressure water or steam.
- Do not direct the LED flashlight towards eyes, as it may cause temporary vision impairment.
- Keep the watch and its accessories out of reach of children.
- Use only the provided charging cable. Unauthorized chargers may damage the device or pose safety risks.
- Avoid extreme temperatures. Do not expose the watch to direct sunlight for extended periods or store it in very cold environments.
3. Setup
3.1 Charging the Device
Before initial use, fully charge your LIGE GPS Smart Watch DM4-B. 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 2.5 hours. The watch features a 600mAh battery, providing up to 7 days of normal usage and up to 30 days of standby time.

Figure 2: Smartwatch connected to its magnetic charger, illustrating battery life.
3.2 App Installation
To unlock the full functionality of your smartwatch, download and install the GloryFitPro app on your smartphone. The app is compatible with iOS 11.0 and above (calls require iOS 13 and above) and Android 5.0 and above. You can find the app on the Apple App Store or Google Play Store, or by scanning the QR code provided in the watch's packaging or the app installation guide image below.

Figure 3: Step-by-step guide for connecting the smartwatch to the GloryFitPro app.
3.3 Pairing with Your Smartphone
- Ensure Bluetooth is enabled on your smartphone.
- Open the GloryFitPro app and follow the on-screen instructions to add a new device.
- Select "DM4" or "DM4-B" from the list of available devices.
- Confirm the pairing request on both your watch and smartphone.
- For call functionality, ensure "Call Audio" is enabled in the watch's Bluetooth settings after initial pairing.
4. Operating Instructions
4.1 Basic Navigation
The LIGE DM4-B features a responsive 1.43-inch AMOLED touchscreen and physical buttons for navigation:
- Touchscreen: Swipe left/right, up/down to navigate menus and access different functions. Tap to select.
- "POWER" Button: Typically used to turn the screen on/off, return to the home screen, or access the app list. A long press may power the watch on/off.
- "BACK" Button: Used to go back to the previous screen or exit a function.
Video 1: Demonstration of the LIGE DM4 smartwatch interface and features, including navigation and various functions.
4.2 Key Features
4.2.1 Compass, GPS & LED Flashlight
The watch features a built-in compass and GPS with support for multiple satellite systems (GLONASS, Beidou, Galileo, NAVIC, QZSS) for accurate outdoor tracking. The integrated LED flashlight provides illumination in low-light conditions. GPS route tracking is most effective in open areas.

Figure 4: The smartwatch's powerful LED flashlight function.

Figure 5: GPS and navigation features, including compass, altitude, and barometric pressure.
Video 2: Overview of the LIGE DM4 GPS sports smart watch, highlighting its compass and flashlight features.
4.2.2 AMOLED Display & Watch Faces
The 1.43-inch AMOLED HD display offers vibrant colors and high contrast for excellent readability. You can customize your watch face from a wide variety of pre-installed options or upload your own photos via the GloryFitPro app for a personalized look.

Figure 6: The watch's AMOLED display and accessible smart functions.
4.2.3 IP68 Waterproof & Swimming Mode
With an IP68 water resistance rating, the watch is designed to withstand water exposure during activities like swimming. A dedicated swim mode tracks strokes, lap count, speed, and calorie burn. Note: This watch is not suitable for diving or sea use.
4.2.4 24/7 Health Monitoring
The smartwatch continuously monitors your health metrics:
- Heart Rate: Real-time heart rate monitoring with customizable alerts.
- Blood Oxygen (SpO2): Measures blood oxygen levels.
- Sleep Tracking: Records deep and light sleep cycles to help improve sleep quality.
- Stress Monitoring: Provides insights into stress levels.
Important: Health monitoring features are for general health and fitness reference only and are not intended for medical use, diagnosis, or treatment.

Figure 7: Overview of the watch's health monitoring capabilities.
4.2.5 100+ Sports Modes
The watch supports over 100 sports modes, including running, cycling, hiking, swimming, and yoga. It tracks real-time data such as route, speed, distance, and calorie burn. GPS functionality is active during outdoor activities.

Figure 8: Examples of the numerous sports modes available on the smartwatch.
4.2.6 Bluetooth Calling & AI Voice Assistant
Make and answer calls directly from your wrist when connected to your smartphone. The integrated AI Voice Assistant allows for hands-free control and quick access to information.

Figure 9: Bluetooth calling and smart voice assistant features.
4.2.7 Other Smart Functions
The LIGE DM4-B includes additional useful functions:
- Weather Forecast
- Stopwatch & Timer
- Music Control
- Brightness Adjustment
- Find Phone
- Alarm Clock
- Camera Control
- Calculator
- Drinking Water Reminder
- Sedentary Reminder
- World Clock
5. Maintenance
- Cleaning: Regularly clean the watch and strap with a soft, damp cloth. For stubborn dirt, use a mild soap solution and rinse thoroughly. Ensure the watch is dry before charging.
- Avoid Chemicals: Do not use harsh chemicals, cleaning solvents, or strong detergents, as they may damage the watch's finish or internal components.
- Storage: When not in use for extended periods, store the watch in a cool, dry place.
- Charging Contacts: Keep the charging contacts on the back of the watch clean and free of debris to ensure proper charging.
6. 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. |
|
| Inaccurate health data. | Ensure the watch is worn snugly on your wrist, not too tight or too loose. Keep the sensor clean. Remember, data is for reference only. |
| GPS tracking is inaccurate. | Ensure GPS is activated in an open outdoor area with clear sky view. Avoid tall buildings or dense foliage. |
| Short battery life. | Reduce screen brightness, disable unnecessary notifications, limit continuous health monitoring, and turn off "Always-on Display" if not needed. Frequent GPS use or Bluetooth calls will consume more power. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | DM4-B |
| Display | 1.43 Inches AMOLED HD Touch Display |
| Battery Capacity | 600 mAh Lithium Polymer |
| Water Resistance | IP68 (5ATM) |
| Connectivity | Bluetooth 4.0 |
| GPS | Built-in GPS (supports GLONASS, Beidou, Galileo, NAVIC, QZSS) |
| Compatibility | iOS 11.0+ (calls iOS 13+), Android 5.0+ |
| Item Weight | 7.4 ounces |
| Package Dimensions | 6.65 x 4.29 x 0.94 inches |
| Special Features | Compass, LED Flashlight, Swimming Mode, Health Monitoring (HR, SpO2, Sleep, Stress), 100+ Sports Modes, Bluetooth Calling, AI Voice Assistant, Customizable Watch Faces |
8. Warranty and Support
LIGE provides a 24-month warranty for the DM4-B Smart Watch. For any issues regarding accessories, quality, operation, or charging, please contact LIGE customer service. They offer 24-hour online support to assist you with solutions within 24 hours.
You can typically find contact information for customer service through the GloryFitPro app or on the official LIGE website. Refer to the image below for general customer service inquiries.

Figure 10: LIGE customer service contact points for support.





