DEMNU Njord Gear Tank S3

DEMNU Njord Gear Tank S3 Smart Watch User Manual

Model: Njord Gear Tank S3

1. Introduction

This manual provides detailed instructions for the setup, operation, maintenance, and troubleshooting of your DEMNU Njord Gear Tank S3 Smart Watch. This rugged smartwatch is designed for active lifestyles, featuring robust construction, comprehensive health monitoring, and convenient communication capabilities.

DEMNU Njord Gear Tank S3 Smart Watch in Ocean Blue, displaying time, steps, heart rate, and notifications.

Image 1.1: The DEMNU Njord Gear Tank S3 Smart Watch, showcasing its display with various metrics and notification features.

2. Package Contents

Please verify that all items are present in your package:

  • Smart Watch (1 unit)
  • Watch Band (1 unit)
  • Charging Cable (1 unit)
  • User Manual (this document)

3. Initial Setup

3.1 Charging the Smart Watch

Before first use, fully charge your smart watch. The device features a 680mAh battery. A full charge typically takes approximately 3 hours.

Smartwatch on a charging dock with a fully charged battery icon, showing 680mAh battery capacity and charging time.

Image 3.1: Illustration of the smartwatch charging, highlighting its 680mAh battery and charging duration.

3.2 App Installation and Pairing

To unlock the full functionality of your smart watch, download and install the companion application on your smartphone. The watch supports Android 5.0+ and iOS 10.0+ devices.

  1. Scan the QR code provided in the watch's packaging or visit the official app download page: http://plus.crrepa.com/app-download/dafit.
  2. Download and install the 'Da Fit' application from your phone's app store (Google Play Store for Android, Apple App Store for iOS).
  3. Open the 'Da Fit' app and follow the on-screen instructions to create an account or log in.
  4. Enable Bluetooth on your smartphone.
  5. In the 'Da Fit' app, navigate to the device section and search for your smart watch. Select 'Njord Gear Tank S3' to pair.
  6. Confirm the pairing request on both your phone and the smart watch.
Screenshots of the Da Fit app interface on smartphones, showing activity tracking and watch face customization, with a QR code for download.

Image 3.2: The 'Da Fit' application interface, demonstrating its features and providing download options for Android and iOS.

4. Operating Instructions

4.1 Basic Navigation

The smart watch features a 1.96-inch AMOLED touchscreen and physical buttons for navigation. Swipe across the screen to access different functions and press the side button to return to the home screen or access the main menu.

4.2 Bluetooth Call and Message Notifications

Once paired with your smartphone, the watch allows you to make and receive calls directly from your wrist using its built-in HI-FI speaker and microphone. It also displays notifications from various applications such as WhatsApp, Facebook, and LINE.

A person wearing the smartwatch while hiking, with an incoming call notification displayed on the watch and a smartphone showing a call interface.

Image 4.1: The smartwatch displaying an incoming call, demonstrating its Bluetooth call and message notification capabilities.

4.3 Health Monitoring

The smart watch continuously monitors your health metrics, including heart rate, blood pressure, blood oxygen (SpO2), and sleep patterns. Access detailed data and trends through the 'Da Fit' app.

  • Heart Rate: Real-time monitoring and historical data.
  • Blood Pressure: Automatic measurement and tracking.
  • Blood Oxygen (SpO2): Monitors oxygen saturation levels.
  • Sleep Monitoring: Analyzes sleep stages (deep, light, REM) and provides sleep quality reports.
A person lifting weights while wearing the smartwatch, with on-screen displays of heart rate, blood pressure, blood oxygen, and sleep data.

Image 4.2: The smartwatch displaying various health metrics, including heart rate, blood pressure, blood oxygen, and sleep data.

4.4 Sports Modes

The watch offers over 123 sports modes to track your physical activities. During exercise, it records data such as heart rate, steps, calories burned, and distance, helping you analyze and improve your performance.

A football player on a field with the smartwatch displaying a football tracking mode, surrounded by icons representing various sports activities.

Image 4.3: The smartwatch interface showing a sports tracking mode, with icons for over 100 different sports activities.

4.5 Additional Functions

The Njord Gear Tank S3 includes several practical features to enhance daily convenience:

  • Calculator: Perform basic calculations directly on your wrist.
  • Remote Camera Control: Use your watch as a remote shutter for your smartphone camera.
  • Voice Assistance: Access your phone's voice assistant.
  • Music Control: Manage music playback on your paired smartphone.
  • Sedentary Reminder: Alerts you to move after periods of inactivity.
  • Breath Training: Guided breathing exercises for relaxation.
  • Drink Water Reminder: Prompts you to stay hydrated.
  • Stopwatch & Alarm Clock: Essential timekeeping tools.
  • Weather Forecast: Displays current weather conditions.
  • Games: Includes simple games for entertainment.
Smartwatch displaying a calculator interface.
Image 4.4: Calculator function.
Smartwatch displaying an alarm clock interface with sleep tracking data.
Image 4.5: Alarm Clock function.
Smartwatch displaying a game interface, specifically a 2048-like puzzle game.
Image 4.6: Game function.
Smartwatch displaying a stopwatch interface with lap times, against a background of racing cars.
Image 4.7: Stopwatch function.

5. Maintenance and Care

5.1 Water Resistance

The Njord Gear Tank S3 is IP69K and 5ATM waterproof, making it suitable for various water activities such as swimming, showering, and handwashing. It can withstand immersion in water for up to 24 hours under normal conditions. Do not immerse the watch in hot water, as this can compromise its seals and water resistance.

Smartwatch being worn by a diver underwater, illustrating its 5ATM waterproof rating.

Image 5.1: The smartwatch demonstrating its 5ATM waterproof capability during underwater use.

5.2 Durability and Cleaning

Constructed from titanium metal and meeting MIL-STD-810H military standards, the watch is designed to be rugged and durable, offering frost protection, dust-proof capabilities, and heat resistance from -40°C to 70°C.

  • Cleaning: Wipe the watch and strap regularly with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials.
  • Storage: Store the watch in a cool, dry place when not in use.
  • Avoid Extreme Conditions: While rugged, prolonged exposure to extreme temperatures or direct sunlight can affect battery life and component longevity.
Collage of images showing the smartwatch's rugged features: frost protection, titanium build, dust-proof, 70°C heat resistance, and MIL-STD testing.

Image 5.2: Visual representation of the smartwatch's MIL-STD-810H certified durability, including resistance to frost, dust, and extreme temperatures.

6. Troubleshooting

If you encounter issues with your DEMNU Njord Gear Tank S3 Smart Watch, please refer to the following common solutions:

  • Watch not turning on: Ensure the watch is fully charged. Connect it to the charging cable and allow it to charge for at least 30 minutes before attempting to power it on again.
  • Cannot pair with smartphone:
    1. Ensure Bluetooth is enabled on your smartphone and the watch.
    2. Make sure the watch is within the Bluetooth range of your phone (typically 10 meters).
    3. Restart both your smartphone and the smart watch.
    4. Clear the Bluetooth cache on your phone (if applicable) and try pairing again.
  • Inaccurate health data: Ensure the watch is worn snugly on your wrist, about one finger's width above your wrist bone. Clean the sensor on the back of the watch.
  • Notifications not appearing:
    1. Check notification permissions for the 'Da Fit' app in your phone's settings.
    2. Ensure the 'Da Fit' app is running in the background and not being closed by your phone's power-saving features.
    3. Verify that notification settings are enabled within the 'Da Fit' app for the desired applications.
  • Short battery life:
    1. Reduce screen brightness.
    2. Disable continuous heart rate monitoring if not needed 24/7.
    3. Limit the number of applications sending notifications to the watch.
    4. Ensure the watch is fully charged each time.

If the issue persists, please contact customer support for further assistance.

7. Specifications

FeatureDetail
BrandDEMNU
Model NumberNjord Gear Tank S3
Display1.96 Inches AMOLED Touchscreen
Resolution320 x 386 pixels
Battery Capacity680 Milliamp Hours (mAh)
ConnectivityBluetooth
Water ResistanceIP69K, 5ATM
Durability StandardMIL-STD-810H
Operating Temperature-40°C to 70°C
Item Weight3 ounces (85 Grams)
Compatible OSAndroid 5.0+, iOS 10.0+
Special FeaturesActivity Tracker, Alarm Clock, Blood Pressure Monitor, Calorie Tracker, Breath Monitor, Heart Rate Monitor, Multisport Tracker, Notifications, Pedometer, Oxymeter (SpO2), Sleep Monitor, Phone Call, Voice Control, Weather Forecast

8. Warranty and Support

Your DEMNU Njord Gear Tank S3 Smart Watch comes with a standard manufacturer's warranty. For specific warranty terms, duration, and to register your product, please refer to the warranty card included in your package or visit the official DEMNU website.

For technical support, troubleshooting assistance beyond this manual, or warranty claims, please contact DEMNU customer service through the contact information provided on the official website or your purchase platform.

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