1. Product Overview
The NORTH EDGE Mars 3 is a robust military-style digital watch designed for durability and functionality. Featuring a carbon fiber case, 50M water resistance, and a range of practical functions, it is suitable for sports and outdoor activities.



2. Key Features
- Carbon Fiber Case: 6 times lighter than steel, 3 times lighter than titanium, strong, sturdy, metal-free, hypoallergenic, antimagnetic, strong chemical resistance, ultra-low thermal expansion, waterproof, and sweatproof.
- Water Resistance: 50M (suitable for swimming, but not hot water, showers, or diving).
- Display: Analog-Digital display with FSTN screen.
- Backlight: LED backlight with automatic backlight function and luminous pointers for clear visibility at night.
- Time Functions: 12H/24H mode, Hour, Minute, Second, Month, Day, Week, World Time (24 time zones), DST (Daylight Saving Time), Automatic Calendar.
- Chronograph: Stopwatch (measures 1/100th of a second in the first hour, then 1-second units up to 24 hours, with split time and elapsed time functions).
- Timer: Countdown timer.
- Alarms: 5 groups of daily alarms and an hourly chime function.


3. Watch Components and Buttons

The Mars 3 watch features four primary buttons:
- ADJUST (Top Left): Used for entering and exiting setting modes, and for confirming selections.
- MODE (Bottom Left): Used to cycle through different watch modes (Time, World Time, Stopwatch, Countdown, Alarm).
- LIGHT (Top Right): Activates the LED backlight.
- START (Bottom Right): Used to start/stop functions (e.g., stopwatch, countdown) and to adjust values in setting modes.
4. Initial Setup
4.1 Calibrating Analog Hands and Digital Display
Before initial use, ensure the analog hands are synchronized with the digital time. If the pointer and screen time are not consistent, or the week display is incorrect, calibration is required.
- Enter the calibration mode (specific steps for "point 10 of the manual" are not provided, but typically involve holding a button like ADJUST).
- Use the START button to adjust the analog hands to match the digital time.
- Confirm the setting using the ADJUST button.
4.2 Setting Time and Date
- Long press the ADJUST button for approximately 2 seconds to enter the setting state.
- Press the MODE button to cycle through different settings (e.g., hours, minutes, year, month, day).
- Use the START button to adjust the selected value.
- Once all settings are correct, press the ADJUST button again to exit the setting mode.
For a visual guide on calibration and time setting, please refer to the product video or contact customer service.
5. Operating Instructions
The watch features multiple modes accessible via the MODE button.
5.1 Navigating Modes
Press the MODE button repeatedly to cycle through the following functions:
- Time Mode: Displays current time, date, and day of the week. The analog hands synchronize with this digital display.
- World Time Mode: Allows you to view the time in 24 different time zones. Use the START button to cycle through time zones.
- Stopwatch Mode:
- Press START to begin timing.
- Press START again to pause.
- Press ADJUST to reset the stopwatch.
- Features 1/100th second measurement for the first hour, then 1-second units up to 24 hours. Includes split time and elapsed time functions.
- Countdown Timer Mode:
- Set the desired countdown time using the ADJUST and START buttons.
- Press START to begin the countdown.
- An alarm will sound when the countdown reaches zero.
- Alarm Clock Mode (ALM):
- The watch supports 5 independent alarms and an hourly chime.
- Use MODE to select an alarm (AL1, AL2, etc.).
- Long press ADJUST to set the alarm time. Use START to change values and MODE to move between hours/minutes.
- Press ADJUST to confirm.
- Press START to toggle alarms ON/OFF.
- Backlight Function: Press the LIGHT button to illuminate the display. The watch also features an automatic backlight.
6. Specifications
| Feature | Specification |
|---|---|
| Brand Name | NORTH EDGE |
| Model Number | MARS 3 |
| Item Type | Digital Wristwatches |
| Movement | Digital |
| Display Type | Analog-Digital |
| Case Material | Carbon Fiber |
| Case Thickness | 15.9mm |
| Dial Diameter | 45mm |
| Case Shape | Round |
| Dial Window Material Type | Hardlex |
| Band Material Type | Silicone (TPU) |
| Band Width | 22mm |
| Band Length | 24cm |
| Clasp Type | Buckle |
| Water Resistance Depth | 5Bar (50M) |
| Battery Mode | CR2016 |
| Electronic Screen | FSTN |
| Weight | 55g (net weight) |
| Boxes & Cases Material | Paper |
| Style | SPORT |

7. Maintenance and Care
- Water Resistance: The watch is 50M waterproof, suitable for swimming and exposure to rain. However, it is NOT suitable for hot water environments such as baths, showers, saunas, or diving. Exposure to hot water can compromise the watch's seals.
- Cleaning: Wipe the watch regularly with a soft, dry cloth to remove dirt and sweat. For stubborn dirt, a slightly damp cloth can be used, followed by drying.
- Avoid Chemicals: Do not expose the watch to strong chemicals, solvents, or detergents, as these can damage the case, strap, or internal components.
- Temperature Extremes: Avoid exposing the watch to extreme temperatures (very hot or very cold) for prolonged periods, as this can affect battery life and display performance.
- Impact: While durable, avoid unnecessary impacts or drops to prevent damage to the internal movement or external casing.
8. Troubleshooting
| Problem | Possible Cause / Solution |
|---|---|
| Analog hands and digital time are not synchronized, or week display is incorrect. | This requires calibration. Refer to Section 4.1 "Calibrating Analog Hands and Digital Display" for instructions. If issues persist, contact customer service for a video guide. |
| Unable to set time or date. | Ensure you are in the correct setting mode. Long press the ADJUST button for 2 seconds to enter setting mode. Use MODE to switch functions and START to adjust values. Refer to Section 4.2 "Setting Time and Date". If issues persist, contact customer service for a video guide. |
| Backlight not working. | Check if the battery needs replacement. Ensure the LIGHT button is pressed firmly. |
| Watch not responding. | The battery might be depleted. Replace the CR2016 battery. If the problem continues, contact support. |
9. Warranty and Support
The NORTH EDGE Mars 3 watch comes with a manufacturer's warranty. Please retain your proof of purchase for any warranty claims.
- Warranty Period: Refer to your purchase documentation or the seller's policy for specific warranty duration.
- Warranty Coverage: Typically covers manufacturing defects. Damage due to improper use, accidents, or unauthorized repairs may not be covered.
- Customer Support: For technical assistance, warranty claims, or further inquiries, please contact the NORTH EDGE Official Store or your point of purchase.
- Free Returns: This product may be eligible for free returns within 90 days, as per AliExpress policy. Check the product page for details.





