ONRHYTHM 110 runner's heart rate monitor watch black



Made for
It's easy to regulate your effort using your target zone.


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Parameter measurementStopwatch, measures heart rate in beats per minute (bpm).
CoachingConfigure your target heart rate zone in beats per minute (bpm).
WaterproofWatch: 5 ATM (swimming) - Strap: 1 ATM (water splashes).
VisibilityReadable screen in full sunlight.
Waranty2 Years
Technical Information

Heart rate is measured in BPM (beats per minute). The more intensively you exercise, the faster your heart beats, and the more your BPM increases. As you train, you will learn the best heart rate for you to be able to complete your run without losing your breath. Aim for that rate, and you will be able to run more regularly and more easily.
Manage your training sessions using the target zone settings.It shows you whether you are in the set zone in real time. With ONrhythm 110, you can set heart rate target zones in beats per minute (BPM).
Your heart rate is measured by the strap worn around your chest.The strap has two electrodes and a transmitter. When your heart beats, it transmits very weak electric fields. They are detected by the electrodes and sent to your watch via the transmitter on the chest strap.
The ONRHYTHM 100 communicates with the chest strap using a non-coded signal. As a result, they can be disturbed by other heart rate monitors nearby. If you run on your own or with a partner who doesn't use a similar heart rate monitor, it's not a problem! If you run with a group, we recommend you choose a coded heart rate monitor, such as the ONRHYTHM 500.
Easy to read in the sun and in the dark.
The ONRHYTHM 110 has what is known as a reflective screen. It reflects the surrounding light.The more sun there is, the easier it is to read the screen! When running in the dark, you can use the backlight button to light your screen.
It's a watch too!
The ONRHYTHM 110 watch also tells the time and date. You can also set an alarm.
Watch: CR2032 included - Strap:CR2032 included
Thickness12mm | Diameter: 43mm Weight: 43g
Warranty & after-sales service
The DECATHLON products are guaranteed for 2 years. If you have any questions, go to our support.geonaute.com support website. You will find advice on how to use your product properly: instructions, frequently asked questions by our users and video tutorials. In order to give you the best possible support, the support team is at your disposal 24 hours a day to answer your questions.
Use restrictions
This watch is designed for sport and leisure. It's not a medical device. The information provided by the watch is for information purposes only and must not be used to track a pathology.
Information / Concept / Technologie
Exclusive of elastic (Only of US) : 35.0% Rubber - Thermoplastic Rubber (TPR), Exclusive of elastic (Only of US) : 30.0% Elasthane, Exclusive of elastic (Only of US) : 30.0% Acrylonitrile butadiene styrene (ABS), Exclusive of elastic (Only of US) : 5.0% Printed Circuit Board Structure : 45.0% Rubber - Thermoplastic Rubber (TPR), Structure : 40.0% Acrylonitrile butadiene styrene (ABS), Structure : 10.0% Stainless steel, Structure : 5.0% Printed Circuit Board Lens : 100.0% Polymethyl Methacrylate (PMMA)


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Too basic
Used for 1 week or less
This does not have even basic features such as showing the avg HR after a workout. All it shows is your heart rate at this moment in time.
Basic heart rate monitor
Used for 2 to 8 weeks
Measures heart rate, time at exercise, target zone, live only, does not record session or time in target zone, large easy to read display, shows current heart rate or time of exercise or time of day. Good training aid.
Heart rate watch
Used for 1 week or less
Great product very impressive
doesn't work
Used for 1 week or less
there is no communication between watch and heart monitor, item returned
Response of the brand
Dear Michal ,
We would like to thank you for getting in touch with us and for bringing this matter to our attention.
We are sorry to hear of your experience at for this product.We understand your concern and we would like to look into this issue and give this feedback to our product manager.
Thank you NOJMUL
On rhythm 110 watch and HRM strap
Used for 2 to 8 weeks
Only recently purchased. Wear at gym during excercise. Reasonably easy to navigate functions, accuracy good. Also works alongside gym equipment.
Heart rate monitor
Used for 2 to 8 weeks
Works well and the chest strap even links with my DKN AM-E exercise bike so heart rate shows on the bikes display
Low Cost Heart Rate Monitor
Used for 2 to 8 weeks
Satisfactory with large display. Setting it up was a bit complicated but seems to work ok.
Geonute HRM
Easy to use.
Used for 2 to 8 weeks
Does the job I needed it to do has the time on it and a rubber strap which is appropriate when I wear it for workouts. Other functions Good though I rarely use them.
Good Value
Used for 3 to 6 months
I have a very expensive Heart Rate watch, as I run ultra-marathons and train using heart rate. I wanted something more simple, and less expensive, for my girlfriend - she wanted to train to heat rate, but didn't need any other complex data fields or GPS. This was perfect - easy to use, large numbers and slim fit. It seems accurate and is certainly good value for money.
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