W500S Running Stopwatch - White

Ref. : 8827977

Our design team developed this watch for everyday use and to help you improve your interval training performances.

Are you looking for a watch for daily use and training?The W500S is ideal for all your activities thanks to its water resistance, backlighting, alarm and training mode

Home delivery

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Our services :

  • Free delivery for Decathlon brands orders above $399
  • All Decathlon products are eligible for lifetime return

Products benefits

Parameter measurement

Enjoy the stopwatch and its history, backlighting, alarm and date.


Enjoy the interval mode with 5 customisable phases.


Waterproof index of 5 ATM (50 m) and buttons for use underwater.


Personalise your watch: select your strap colour (extra option)!


Better visibility thanks to the screen quality and display font.

Ease of use

Easy to navigate and adjust the watch settings.

Easy assembly / dismantling

Change your strap easily with the standard system, no tools required

Technical information

Time your workouts

With a stopwatch function that's accurate to 1/100th second and lap timer, you can measure your performances and progress.

Record your sessions

The 5 last sessions carried out with the stopwatch will be saved in the history mode.
There, you can consult all the lap times you have measured.

Improve your performance with the interval training mode

You can configure your own training sessions directly via the watch.And personalise your progress to suit your goals!
5 configuration phases available (warm-up, action, rest, number of repetitions and sets, time between sets and recovery time).
For example:
- 20' warm-up
- 8 repetitions 30 s action/30 s recovery
- 2 sets
- 2' rest between sets
- 10' recovery at end of workout

Enjoy your watch in all environments with the waterproof index of 5 ATM (50 metres).

Keep your watch on as you swim along the surface or have a shower after your exertions, it's waterproofed to 5 ATM and has buttons that work underwater.

Easy to change strap.

Change your strap easily, no tools required.

Choose your language

Choose between 4 languages:French, English, Spanish or Italian.

Dimensions and weight


Length = 205mm
Width = 16mm

WEIGHT = 24g

Battery life

The product has a battery life of 2 years with the original battery

Spare parts

Straps available on our website
Batteries (CR2016)


2 years

Product concept & technology

Product Composition

Carcass 90% Acrylonitrile Butadiene Styrene, 10% Polymethyl Methacrylate Strap 80% Silicone, 20% Stainless Steel


Decathlon teams have been designing watches specifically for sports use for 20 years.
During development, each model undergoes more than 30 different tests in the laboratory as well as some tests in the field conducted by our teams of testers.

Maintenance advice

Do not wash

Do not bleach

Do not tumble dry

Do not iron

Do not dry-clean

User reviews

Questions & Answers