GUHUAVMI T-Rex 3 GPS Smart Watch User Manual

1. Introduction

The GUHUAVMI T-Rex 3 GPS Smart Watch is a robust and feature-rich device designed for outdoor enthusiasts and daily users. It combines advanced GPS capabilities with comprehensive health monitoring, a durable build, and smart connectivity features to support an active lifestyle.

This manual provides detailed instructions on how to set up, operate, and maintain your smartwatch, ensuring you get the most out of its powerful functionalities.

2. Product Overview

The T-Rex 3 GPS Smart Watch features a zinc alloy body with carbon fiber texture, a 1.75-inch AMOLED display, and a sport silicone strap. It is equipped with multiple sensors for health and activity tracking, along with GPS for precise positioning.

Close-up of the smartwatch showing LED flashlight, zinc alloy bezel, sport silicone strap, and wrist-based optical heart rate monitoring sensors. — Figure 2: Detailed view of the smartwatch components including the high-power LED flashlight, zinc alloy bezel, sport silicone strap, and optical heart rate sensors.

Key Features:

Display: 1.75-inch AMOLED HD Full Touch Screen (466*466 resolution)
Positioning: GPS + BeiDou Four-Satellite Positioning (Quad-constellation)
Durability: 10ATM/IP68 Professional Waterproof, Military-Grade Durability (Drop-Tested, Corrosion, High Temperature, Dust-proof)
Battery: 950mAh High-Capacity Battery (up to 40 days standby, 8-12 days work time)
Connectivity: Bluetooth 5.3 for calls and notifications
Health Monitoring: Heart Rate Monitor, Blood Oxygen Monitor, Blood Pressure Monitoring, Sleep Monitor, Stress Monitor, Women's Health Monitoring, Temperature Monitoring, One-click intelligent physical examination
Activity Tracking: 170+ Sports Modes (including GPS Walking, Running, Cycling, Swimming), Steps Tracker, Distance Tracker, Calorie Tracker, Activity Tracker
Outdoor Tools: Compass, Altimeter, Barometer, LED Flashlight
Smart Functions: Voice Assistant, Message Reminder, Call Reminder, Answer Call, Dial Call, Remote Control (camera, music), Weather Forecast, Sedentary Reminder, Breathing Exercise, Multiple Dials
Compatibility: All Compatible (Android OS, iOS)

3. Setup Guide

3.1 Initial Charging

Before first use, fully charge your smartwatch. Connect the magnetic charging cable to the charging port on the back of the watch and plug the USB end into a power adapter (not included) or a computer's USB port. The watch will display a charging indicator.

Smartwatch charging indicator and battery life information. — Figure 3: Smartwatch displaying battery life and charging status.

3.2 Power On/Off

Power On: Press and hold the power button (usually one of the side buttons) until the screen lights up.
Power Off: Navigate to the settings menu on the watch, find the 'Power Off' option, and confirm. Alternatively, press and hold the power button and select 'Power Off' if prompted.

3.3 App Installation and Pairing

The companion app for this smartwatch is named Gband. Please download it from your smartphone's app store (Google Play Store for Android or Apple App Store for iOS).

Download and install the 'Gband' app on your smartphone.
Ensure Bluetooth is enabled on your smartphone.
Open the Gband app and follow the on-screen instructions to create an account or log in.
In the app, navigate to the device pairing section (often labeled 'Device', 'Add Device', or similar).
Select your smartwatch from the list of available Bluetooth devices. The watch may display a pairing code for confirmation.
Confirm the pairing on both your smartphone and the smartwatch.
Once paired, the app will synchronize data with your watch and allow you to customize settings, watch faces, and view detailed health and activity data.

4. Operating Instructions

4.1 Basic Navigation

Touch Screen: Swipe left, right, up, or down to navigate through menus and screens. Tap to select items.
Buttons: The watch features 3 physical buttons for various functions, typically including power, back, and quick access to sports modes or other features. Refer to the on-screen prompts for specific button functions.

4.2 Health Monitoring

The watch continuously monitors various health metrics. To view detailed data, open the respective application on the watch or check the Gband app on your smartphone.

Heart Rate: Real-time heart rate tracking.
Blood Oxygen (SpO2): Measures blood oxygen saturation levels.
Blood Pressure: Provides blood pressure readings.
Sleep Monitoring: Tracks sleep patterns and quality.
Women's Health: Features for menstrual cycle and pregnancy planning.
Temperature Monitoring: Monitors body temperature.

Screenshots of the smartwatch displaying heart rate, blood pressure, blood oxygen, and sleep monitoring data. — Figure 4: Health monitoring features including heart rate, blood pressure, blood oxygen, and sleep tracking.

4.3 GPS and Outdoor Features

The watch supports GPS and BeiDou quad-constellation positioning for accurate outdoor activity tracking.

GPS Tracking: Records your workout routes and provides data like distance, speed, and pace.
Compass: Provides real-time directional guidance.
Altimeter & Barometer: Measures altitude and atmospheric pressure, useful for hiking and mountaineering.

Smartwatch displaying GPS quad-constellation positioning with a map showing a tracked route. — Figure 5: GPS quad-constellation positioning for precise activity tracking and mapping.

Smartwatch displaying compass, elevation, and barometer readings, with a background of snowy mountains. — Figure 6: Compass, Altimeter, and Barometer functions for outdoor adventures.

4.4 Sports Modes

Access over 170 sports modes from the watch menu. Select your desired activity to start tracking. The watch will record relevant metrics such as duration, distance, calories burned, heart rate, and steps.

Smartwatch displaying outdoor running mode metrics including workout duration, distance, calories, route, steps, speed, cadence, pace, and heart rate charts. — Figure 7: Outdoor Running Mode Metrics and GPS track visualization.

4.5 Bluetooth Calling and Notifications

Once paired with your smartphone, the watch allows you to make and receive calls directly from your wrist. It also displays notifications for messages (WeChat, QQ, SMS) and other apps.

Smartwatch showing an incoming call screen, with a smartphone displaying the same call. — Figure 8: Bluetooth calling feature, showing an incoming call on the smartwatch and a connected smartphone.

4.6 Other Smart Features

LED Flashlight: Activate the high-power LED flashlight from the watch interface for illumination.
Remote Control: Control your smartphone's camera and music playback directly from the watch.
Raise to Wake: Lift your wrist to automatically wake the screen.
Sedentary Reminder: Receive alerts when you've been inactive for too long.
Breathing Training: Guided breathing exercises for relaxation.

5. Specifications

Diagram showing smartwatch dimensions and a table of product parameters. — Figure 9: Product dimensions and key technical parameters.

Attribute	Value
Brand Name	GUHUAVMI
Model	smart watch (T-Rex 3 GPS)
Display Size	1.75-inch AMOLED HD Full Touch Screen
Resolution	466*466 Full Touch Screen
Screen Material	AMOLED
Dial Window Material Type	Sapphire Crystal
Case Material	Alloy (Zinc Alloy)
Band Material	Fine Steel / Sport Silicone
Band Length	260mm
Band Width	22mm
Weight	55g
Waterproof Grade	Professional Waterproof (10ATM/IP68)
Battery Capacity	950mAh (>450mAh)
Battery Life	336 hours (approx. 14 days typical use, 40 days standby)
Charging Method	Magnetic charging
Bluetooth Version	5.3
CPU Model	Laser non-invasive AI doctor for precise diagnosis (Processor: JL7012A7)
RAM	128 MB
ROM	128 MB
System Compatibility	Android OS, iOS (All Compatible)
App Name	Gband
Certification	CE, FCC, RoHS
Package Dimensions	10cm (L) x 6cm (W) x 4cm (H)
Package Weight	0.25 kg

6. Maintenance and Care

6.1 General Care

Clean the watch regularly with a soft, dry cloth.
Avoid exposing the watch to extreme temperatures or direct sunlight for prolonged periods.
Do not use harsh chemicals or abrasive materials for cleaning.

6.2 Water Resistance Precautions

The watch is rated 10ATM/IP68 Professional Waterproof, suitable for swimming and showering. However, please observe the following precautions:

Smartwatch submerged in water, illustrating its IP68 waterproof rating. — Figure 10: The smartwatch is IP68 waterproof, suitable for various water activities.

Seawater: This product is not suitable for use in seawater. Seawater is corrosive and can damage the watch.
High Temperatures: High temperatures may cause the waterproof adhesive on the casing to lose its stickiness, gradually compromising waterproof functionality. Therefore, it should not be used in high-temperature water environments, such as hot showers, saunas, hot springs, etc.
Buttons: Do not press the watch buttons while submerged in water.
Charging Port: Before charging, ensure the charging port is completely dry to prevent damage.

6.3 Battery Care

Avoid completely draining the battery frequently.
Charge the watch using the provided magnetic charging cable.
Do not attempt to replace the battery yourself, as it is not detachable by the user.

7. Troubleshooting

Problem	Possible Solution
Watch won't turn on	Ensure the watch is fully charged. If it still doesn't turn on, try a hard reset (refer to the app or online support for specific instructions).
Cannot pair with smartphone	1. Ensure Bluetooth is enabled on your phone. 2. Make sure the watch is sufficiently charged. 3. Restart both the watch and your phone. 4. Try unpairing and re-pairing the device through the Gband app. 5. Ensure the Gband app has necessary permissions on your phone.
Inaccurate health data	1. Ensure the watch is worn snugly on your wrist, not too tight or too loose. 2. Clean the sensors on the back of the watch. 3. Avoid excessive movement during measurements. 4. Note: This product is not a medical device. All detected data and results are for reference only and should not be used for medical purposes.
GPS not tracking accurately	1. Ensure you are in an open outdoor area with a clear view of the sky. 2. Allow the watch sufficient time to acquire a GPS signal. 3. Check for any obstructions that might interfere with the signal.
Short battery life	1. Reduce screen brightness. 2. Disable unnecessary notifications or features (e.g., Always-On Display). 3. Limit continuous GPS tracking if not needed. 4. Ensure the watch is fully charged each time.
Notifications not appearing	1. Ensure the watch is properly paired with your phone. 2. Check notification settings in the Gband app and on your phone. 3. Make sure the Gband app is running in the background and not restricted by battery optimization settings.

8. User Tips

Customize Watch Faces: Explore the variety of watch faces available through the Gband app to personalize your device.
Regular Synchronization: Sync your watch with the Gband app regularly to ensure all your health and activity data is saved and updated.
Explore Sports Modes: Take advantage of the 170+ sports modes to accurately track your diverse physical activities.
Stay Updated: Keep the Gband app and your watch's firmware updated to benefit from new features and performance improvements.
Optimize Battery: If you need to extend battery life, consider adjusting screen brightness, turning off continuous heart rate monitoring, or limiting GPS usage when not actively tracking an outdoor workout.

9. Warranty and Support

For any issues not covered in this manual or for warranty claims, please contact the seller or manufacturer's customer support. Keep your purchase receipt as proof of purchase.

This product is certified with CE, FCC, and RoHS standards.