Trek 500

REF: 8560560, 8560562



Startup, language and mode

How many languages ​​are available and how do adjust them?

MW mountain watches have 2 languages (French or English).

The language can be set during the first start or via the info menu.

This menu can be accessed by keeping the 4 buttons pressed for 3 seconds. This activates the INFO mode which contains the software version, the language setting as well as the possibility of returning the watch to factory mode (RESET).

My watch remains off, why?

MW mountain watches have a standby mode that saves the battery when not used for a long time.

This mode is enabled by default in production to ensure maximum battery life when purchasing. To exit standby mode, press the START / STOP button for 3 seconds and wait for the animation to scroll completely on the screen (scroll by 4 lines + ringtone).

Proceed in the same way to place the watch in standby mode.

NB, in standby mode, the screen remains off but the time and date and the settings continue to be active. No need to re-adjust the watch

How to clear memory and restore factory settings?

In case of problems or if you are invited to do so by a technician, a reset (factory mode) is possible by keeping the 4 buttons pressed.
This activates the INFO mode which contains the software version, the language setting as well as the possibility of returning the watch to factory mode (RESET).


What is an elevation gain (positive or negative)?

The elevation gain is a difference in altitude between two points. we also speak of altitude differential.
Ascent or Descent also called cumulative Ascent (or Descent)  is the sum of all elevations of the same sign during a session. This data is available during a session recorded or after having saved it in memory.

How to adjust the altitude?

Before each ride and especially if the weather is changeable, the altimeter should be adjusted.

This adjustment is made in altimeter mode (first mode after time mode) by pressing the LIGHT / SETTINGS button for 3 seconds. You can select firstly the units and so adjust the altitude by pressing the + and - icons on the screen. Remember to validate by using the START / STOP button.

NB: adjusting the altitude during a recording does not affect the calculation of elevation gain.

Why does the altitude change when i am not moving?

MW mountain watches use a barometric sensor to measure ambient pressure and determine altitude.

The pressure is likely to change depending on the weather (changes over several hours or minutes) or an excessive pressure due to strong wind or water (swimming, shower, very fast movements into the wind).

These events therefore bring about a change in altitude calculated by the watch that could be of difference of several meters.

In the specific case of swimming, remember to stop recording the hike to avoid distorting the calculation of vertical speeds and elevation gains.

Compass (mw trek 900 only)

The compass does not work correctly: what to do?

The compass is available on the MW TREK 900 models.

It works thanks to a magnetic sensor which needs to be recalibrated regularly. The calibration procedure is carried out, watch on the wrist via the settings menu, performing a movement of "eight" for 3 seconds.

During this adjustment, take care not to be close to a large metal mass as it may corrupt the settings.

Recording and memory

How and why to record a hike?

Session recording is available from the altimeter menu.

It enables access to various additional measurements to the altimeter such as positive and negative elevation gain, ascent and descent times, ... (refer to the instructions).

At the end of the session, it is possible to save it (1 on the MW TREK 500 model and up to 10 on the MW TREK 900 model). The session recording also allows you to accumulate the total positive elevation of all your recorded sessions (even if they are subsequently deleted) as well as the maximum altitude reached, all sessions combined.

Do mw watches record the gps track?

No, our watches do not have GPS and cannot calculate the position. There is therefore no possibility of retrieving a GPX trace from the watch

Are mw watches connected?

No, our watches have been developed to provide a simple and affordable measuring tool for your mountain activities.
They are therefore not connected and it is therefore not possible to recover the information present in memory.

Battery and power

How do i replace the battery in my mw mountain watch?

Battery replacement is done without tools, using a coin.
1 / Turn the battery cover to place the cursor marked with a point in front of the "open padlock" symbol
2 / using a pen or a point, remove the used battery and replace it with a new one (markings on the outside
3 / Replace the battery cover ensuring the presence of the seal
4 / Rotate the cover clockwise to lock it ("lock closed" position)
5 / Restart the watch by pressing the START / STOP button for 3 seconds

What type of battery can i use with my mw mountain watch?

Our watches are compatible with any brand of battery in CR2032 format.

WARNING. Never let a child handle this type of battery (risk of ingestion)

Are mw mountain watches rechargeable?

No, our watches use lithium batteries allowing them to operate between 12 and 24 months depending on their use (higher consumption in recording mode)


Are mw mountain watches waterproof?

Yes, all MW watches are water resistant to 5 ATM and tested to an international standard. You can bathe with it without worries!

What type of glass is used on watches? is it scratch resistant?

The MW 500 model uses a mineral glass providing superior resistance to "plastic" glasses (PC or PMMA).
The MW 900 model uses a sapphire crystal which is even superior and which is the market benchmark in terms of scratches

I maintain my watch

- Cleaning the watch :
In order to keep your watch glass clean, it is advisable to clean it with a damp cloth.

You can also clean the charging connector with a dry toothbrush.


Here you will find the troubleshooting sheet for the FORCLAZ MW TREK 500 ET 900 WATCHES.
By following the steps in this sheet, you can check if there is a possible problem with your product. If necessary, you will find in the "I REPAIR" section the tutorials indicated for the repair. You can also come to the workshops of your DECATHLON store.

Link to download the watch troubleshooting sheet (coming soon).

I repair my watch

The following repairs can be carried out on this product :

Bracelet change

The strap of your watch can be disassembled without tools by pulling the trigger on the pin of the strap.

To reassemble the bracelet, place the pin in the hole of the watch, pull the trigger then place the bracelet between the two lugs of the watch. Release the trigger and move the bracelet slightly to make sure the trigger is secure.

Battery change

To change the battery in your altimeter watch, please follow the steps explained in the video opposite :

End of product life

If your product cannot be repaired, return it to a WEEE collection point or any DECATHLON store to optimize recycling.

Spare parts

Here is the list of spare parts for the FORCLAZ MW TREK 500 ET 900 WATCHES :

- CR2032 BATTERY :
Reference: 5867205

- Bracelet MW Trek 900 Black :
Reference: 8731550

You can order spare parts on our website (depending on availability) by clicking on one of the buttons below.

MW Trek 500 et 900
MW Trek 500 et 900

Cr2032 battery

Reference : 5867205

Workshop services

You want to entrust us with your product for repair. Here is the list of services offered by our workshops :

Used resale

Coming soon


  • Need the product manual? Click download.

MW Trek 500 et 900

Contact form

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