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ONstart 310 stopwatch black orange

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Sale price: QAR 119.00 QAR 119.00

Special product, Innovation Special product, New Release Special product, Sale End series Personalize me Eco-design Same day delivery

Our dedicated team of runners has designed this watch for you so you can time your performances and programme your interval training

Essential training functions.stopwatch, countdown and 50 split times.

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Sale price: QAR 119.00 QAR 119.00

Regular price:

Product Features

A photo of the ONstart 310 stopwatch black orange in use

Parameter measurement

Stopwatch (1/100 sec) with 50 split and lap times.


3 countdown modes depending on your sport: MATCH, COACH and UP&DOWN


Pace tracker (PACER)


Time, date and alarm.


Automatic or manual stand-by mode for optimising battery life


Rainproof (1 ATM)

Easy reading

Large digits for perfect legibility when practising sports.

Easy maintenance

Manual opening makes it easy to replace the battery.

Product Reviews

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475 reviews

ONstart 310 stopwatch black orange
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Mid to low range

I was expecting a bit more reliability for the price. As a time keeper at swimming galas, a reliable stop watch is essential when timing 100+ races, but this let met down too many times.

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Nice Chrono

I don't know much about chronos nor what's out there but this one is very responsive and very easy to use.

Not good

This product is not comfortable and handy

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Product was better then I expected. At this price point just go for it.

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Pathetic quality

I have returned the same and taken my money back. Ideally I Shud be asking decathlon to indemnify me as this product was bought and replaced twice yet finally I had to take my money back. It was not in working çondition. Time waste, hapazard parking omg it was a pain

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perfect stop watch

good choise

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Dear Kokozan, thank you for your time in leaving us with a 5-Star rating on our product. We are glad that we managed to delight you with the standards of our product. We really appreciate your loyalty with Decathlon. Please let us know if there is anything else we can improve on in the future. Thank you once again for your time and we hope to serve you again soon! :)


Kalenji Onstart 310 Stopwatcb

Friendly interface and easy to use

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Hi He,

Thank you for taking the time to review our products. We are pleased to hear that this item meets your expectations!

We look forward to more of your reviews and sharing! Plus, the new Decathlon app has been launched and you can now purchase all your favourite sports goods with just a few clicks on your smartphone! Yes, it's now available both in the App store and Google Play Store! Download now and happy shopping!

Thank you for your support and stay safe! :)

Sport on safely!


CSM Digital Leader


ใช้ดีแต่เสียงดังมากค่ะ มีวิธีปิดมั้ยคะ



KALENJI นาฬิกาจับเวลารุ่น ONstart 310 ไม่สามารถปิดเสียงได้ครับ

เพื่อให้ทุกคนได้รับประโยชน์และความสุขจากการเล่นกีฬา อย่างยั่งยืน

Sarawoot Promsriroj (JACK)

Trekking bikes &​ Workshop and​ Triathlon Enthusiasm

Decathlon Rangsit

Tell 020631990

Line ID: Jackphichit



ขอขอบคุณประสบการณ์ในการใช้นาฬิกาจับเวลารุ่น ONstart 310 


Sarawoot Promsriroj (JACK)

Road Running &Triathlon Leader Decathlon Rangsit

Tell +66848336355

Line ID: Jackphichit

Faceboo​k: Sarawoot​ Promsriroj


อยากให้สามารถ lap time ได้ถึง 100

ขอขอบคุณประสบการณ์ในการใช้นาฬิกาจับเวลารุ่น ONstart 310


Sarawoot Promsriroj (JACK)

Road Running &Triathlon Leader Decathlon Rangsit

Tell +66848336355

Line ID: Jackphichit

Faceboo​k: Sarawoot​ Promsriroj



icon-circle-checkmark Verified purchase


Благодарим Ви за отделеното време и оценката, която сте дали за нашия продукт. Качественото обслужване, доволните клиенти и предоставянето на възможността всички да спортуват е наша главна цел.

Спортни поздрави,

Екипът на Декатлон България!


Много е добър за цената си

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Спортен хронометър

Работи точно и безотказно.Доволни сме от покупката. Ще го препоръчам на колегите.

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Як е хронометър и таимер за часовете и други яки функции

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Additional Product informations



  • 20% Acrylic
  • 80% Acrylonitrile Butadiene Styrene

Inside room

  • 20% Battery - Li Po
  • 80% PCBA

Stopwatch with up to 50 saved lap times

Up to 99hrs 59mins 59sec and 50 split times (split and lap).The stopwatch measures the following:1/ split times = SPLIT: the time elapsed since the start,2/ lap times = LAP: the time elapsed since the last lap time measurement.


When using the stopwatch, the first 50 split times and lap times are memorised. They can be recalled, whether the stopwatch is running or not.You can view the following in the memory:the fastest lap time, the slowest lap time, the average lap time out of the X saved times, the last lap time, the penultimate lap time, etc.

Coach countdown

Create your training session to manage your efforts:- your warm-up time (WARM UP)- your acceleration / fast exercises time (RUN)- your recovery / slow exercises time (REST)- the number of RUN and REST in a series (REPEAT)- the number of RUN+REST exercise series (SERIES)- your time between 2 series of exercises RUN+REST (BREAK)- your end-of-session / stretching time (COOL).Up to 99 series and 99 repetitions.

Match countdown

Countdown with several programmable times (up to 9 blocks and 99 repetitions).Perfect for refereeing a match with several periods of play.

Up & down countdown

Countdown associated with a stopwatch. At the end of the countdown, the stopwatch starts automatically. Perfect when starting a race with a countdown (e.g. at a sailing regatta).

Pacer function:stride pace

The PACER means you can set a pace per minute with beeps at set intervals. It is combined with a stopwatch.Set the required rate (between 1 and 240 beeps minute) and the stopwatch will beep at this rate to give you the pace.

Perfect visibility

Big screen with a 3-row display.


This product is waterproof at 1 ATM, i.e. resistant to rain and use in a damp atmosphere such as a pool.

Specially designed for comfort and precision

The ergonomics of this stopwatch have been carefully designed so that the buttons are accessible and can be used with precision.The design of the stopwatch and its lightweight construction mean you can hold it comfortably in your hand.Because it is crucial to know precisely whether you have activated the stopwatch, you will hear a click when you press a button.The wide strap will let you keep it comfortably around your neck.

Save your battery

your stopwatch will not stay on forever at the bottom of your bag.It automatically goes to stand-by mode after 24 hours.You can also switch to stand-by mode manually.

How to choose the right stopwatch.

The range:- OnStart 110: stopwatch with 1 split time, time, date, alarm- On Start 310: stopwatch with 50 split times, MATCH mode, COACH mode, UP & DOWN mode, speed pacer, rain resistant- On Start 710: stopwatch with 300 split times, MATCH mode, COACH mode, UP & DOWN mode, speed pacer, pace tracker, speed tracker, rain resistant, light- On Start:

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