Bracelet Connecté Kalenji ONcoach 900 HR

Ref: 8485288, 8485289, 8519625, 8519415

ONcoach 900 HR

The ONcoach 900 HR connects to your phone using the DECATHLON CONNECT application.

To discover and download DECATHLON CONNECT, click here.

Note : The phone notifications feature on the ONcoach 900 HR is only available with an Iphone.


What is the speed displayed during my activity?
How to calibrate ONcoach 900?
How to save a session?
How can I see that I have attained my daily objective regarding the number of steps?
How does the automatic activity detection mode work?
How does the touchscreen work?
How to change the wristband?
How to select the wrist on which I am wearing my ONcoach 900 HR?
How to reset the stopwatch to "0"?
Is ONcoach 900 HR waterproof?


The number of steps in "my day" seems low. Is this normal?
My ONcoach 900 HR records data if place it on a table, is this normal?
Why is the number of steps of my everyday activity inaccurate?
Heart rate is not accurate?
What is the accuracy of ONcoach 900 HR?
Why does ONcoach 900 HR not count my steps correctly?
Why is the accuracy not the same for the walking and running sessions?
How to calibrate ONcoach 900?
How to improve the accuracy of ONcoach 900 HR?
What type of walking should I practice with ONcoach 900 HR?
Is it possible to use my Oncoach 900 HR with crutches?
Is it possible to use my Oncoach 900 HR with training bike?


How to modify a session?
How to update ONcoach 900 HR?
How to recover the data of ONcoach 900 HR in the app?
Can I delete a session?
Must I keep my phone and my watch connected at the same time?


How to connect to Oncoach 900 for the first time?


How to reset my ONcoach 900 ?
What should I do if the screen freezes?
How to change the display of ONcoach 900 HR ?
What does the term "Active time" mean?
How to enable/disable the notifications?
My product does update, what can I do ?
Can I switch off Oncoach 900?
How to disable the backlighting of the screen?
My product does not switch on when I charge it, what can I do ? 
How are defined "training zones"?


it is recommended to rinse your watch with clear or slightly soapy water because sweat, chlorine or salt water can deteriorate materials such as that of the bracelet over time
Then, using a cloth, wipe and dry the watch.

Avoid certain exposures:
- Has a magnet because the watch contains a magnetometer which could be damaged
- In the sun because prolonged exposure to the sun can have various repercussions, such as the loss of colors or the degradation of the battery and its lifespan.
- Chemical products because they are aggressive (household products, cosmetics, etc.)
- To children: the product contains a battery which can be fatal if swallowed.


Here you will find the troubleshooting sheet for the ONCOACH 900 HR.
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).


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

(No workshop service for the ONCOACH 900 HR).


Coming soon