Introduction
The DECATHLON W500M Running Stopwatch is designed for everyday use and to assist in improving interval training performance. This manual provides detailed instructions on how to set up, operate, and maintain your stopwatch, ensuring optimal use and longevity.
Product Overview
The W500M stopwatch offers a range of features to enhance your training experience:
- Parameter Measurement: Includes stopwatch function with history, backlighting, alarm, and date display.
- Coaching Features: Interval mode with 5 customizable phases for structured training.
- Durability: Waterproof to 5 ATM (50 meters), with buttons usable at the surface while swimming.
- Customization: Personalize your watch by selecting your strap color (extra option).
- Visibility: Enhanced readability due to high screen quality and clear display font.
- Ease of Use: Simple navigation and adjustment of watch settings.
- Easy Assembly/Dismantling: Strap can be changed easily with a standard system, no tools required.

Image: The DECATHLON W500M Running Stopwatch, featuring a black rectangular display with digital time and stopwatch readings, and a black silicone strap. The watch face shows '23:45:34' and '0'03'40' with small icons for backlight, mode, and play/pause.
Setup
Before first use, ensure the watch is powered on and set correctly.
- Initial Power On: If the screen is blank, press and hold any button for a few seconds to activate the display.
- Setting Time and Date:
- Press the MODE button (usually on the side) until you reach the Time/Date setting screen.
- Use the ADJUST or SET button (refer to watch specific button labels) to enter edit mode.
- Use the UP/DOWN or LAP/RESET buttons to adjust values (hours, minutes, day, month, year).
- Press MODE or SET again to confirm and move to the next setting, or exit.
- Understanding Buttons: Familiarize yourself with the watch's buttons. Typically, there are buttons for MODE, START/STOP, LAP/RESET, and LIGHT/BACKLIGHT.
Operating Instructions
Stopwatch Mode
- Press the MODE button until the stopwatch display appears (usually indicated by '00:00:00').
- Press the START/STOP button to begin timing.
- Press START/STOP again to pause the stopwatch. Press again to resume.
- While the stopwatch is running, press the LAP/RESET button to record a lap time. The current lap time will be displayed briefly.
- When paused, press the LAP/RESET button to reset the stopwatch to zero.
Interval Training Mode
The W500M allows for 5 customizable interval phases.
- Navigate to the Interval Mode using the MODE button.
- Enter the settings menu for Interval Mode (refer to watch specific button for 'SET' or 'ADJUST').
- Set the duration for each of the 5 phases (e.g., warm-up, active, rest, cool-down).
- Once phases are set, press START/STOP to begin the interval training sequence. The watch will alert you when to transition between phases.
Alarm Function
- Press the MODE button until you reach the Alarm setting screen.
- Use the ADJUST or SET button to enter edit mode.
- Set the desired alarm time using the UP/DOWN buttons.
- Activate or deactivate the alarm using the designated button (often a separate toggle or a press of the START/STOP button).
Backlight
To illuminate the display in low-light conditions, press the LIGHT button (usually located on the top left or right side of the watch).
Viewing History
The W500M stores your stopwatch and lap time history.
- Navigate to the History/Memory mode using the MODE button.
- Use the UP/DOWN or LAP/RESET buttons to scroll through recorded times and dates.
Maintenance
- Cleaning: Wipe the watch regularly with a soft, damp cloth. Avoid harsh chemicals or abrasive materials.
- Water Resistance: The watch is waterproof to 5 ATM (50 meters). This means it is suitable for showering, swimming, and surface water sports. Do not press buttons underwater beyond the specified depth or pressure limits. Avoid exposing the watch to hot water or steam, as this can compromise the seals.
- Strap Replacement: The strap can be easily changed without tools. Simply locate the quick-release pins on the underside of the strap and detach. Attach a new compatible strap by aligning the pins and securing them.
- Storage: Store the watch in a cool, dry place when not in use.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | Low battery or watch is in sleep mode. | Press any button to wake the watch. If still blank, consider battery replacement (consult service center if not user-replaceable). |
| Buttons are unresponsive. | Temporary software glitch or debris. | Try pressing buttons firmly. If unresponsive, attempt a soft reset (refer to specific model instructions for reset, often holding multiple buttons). Ensure no debris is lodged around buttons. |
| Stopwatch not accurate. | Rare software issue. | Perform a full reset of the watch (this may clear all settings and data). If problem persists, contact customer support. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | W500M |
| Item Model Number | 8602734 |
| Brand | DECATHLON |
| Water Resistance | 5 ATM (50 meters) |
| Special Feature | Alarm Clock |
| GPS | No GPS |
| Shape | Rectangular |
Warranty and Support
For warranty information and customer support, please refer to the official DECATHLON website or contact their customer service directly. Keep your proof of purchase for any warranty claims.
Online Support: Visit the official DECATHLON support page for FAQs, troubleshooting guides, and contact options.
Service Centers: For repairs or in-person assistance, locate your nearest authorized DECATHLON service center.





