ONRHYTHM 110 watch and HRM strap blue



Made for athletes who want to measure their heart rate to manage their effort
Manage your effort easily with the target zone function.

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Parameter measurementStopwatch, heart rate in BPM, backlight, alarm
Ease of useEssential cardio features. User-friendly menus and easy browsing
WaterproofWatch: 5 ATM (swimming) - Chest strap: 1 ATM (water splashes).
CoachingSetting of a target zone in heartbeats per minute (BPM)
Waranty2 Years
Technical Information

Measurement set-up
Stopwatch, heart rate in beat per minute (BPM)
Watch: CR2032 included - Belt: CR2032 included
Pack content
ONrhythm 110 HRM watch + non coded cardio belt, plastic + user guide
Heart rate monitor
Non coded signal:Plastic belt
Target zones
You can set up a target zone for a better management of your training. It shows you, in real time, whether you are within the target zone you have set up. The ONrhythm 110 features a mode that lets you set up heart rate target zones in beats per minute (BPM).
Time, date, alarm and backlight



TypeHeart rate monitor

TechnologyNon coded analogue
Information / Concept / Technologie
Elasticised band : 35.0% Rubber - Thermoplastic Rubber (TPR), 30.0% Elastane, 30.0% Acrylonitrile butadiene styrene (ABS), 5.0% Printed Circuit Board Structure : 45.0% Rubber - Thermoplastic Rubber (TPR), 40.0% Acrylonitrile butadiene styrene (ABS), 10.0% Stainless steel, 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.
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.
Does the job
Used for 2 to 8 weeks
I've had problems getting Heart Rate Monitors to link to my mobile/smartwatch via Bluetooth, so thought I'd try this low-tech alternative instead.
This is very easy to use, with no set up required, beyond putting the battery in the HRM!. To use, simply strap on the HRM belt and press the coloured button on the watch. The watch picks up the HRM reading automatically. I use this for long distance running - training and races, and it's worked well.
So if you just need to know your current heart rate this is for you. If you want to record your heart rate history and download this to a computer then you'll need to look elsewhere.
I was dubious that something so reasonably priced could work so well, but delighted that it does!
Dreadful instructions
Used for 1 week or less
The instructions state that one must follow the intuitive onscreen guide. Complete rubbish !
The instructions cannot be followed.
There are not even instructions on this company site
Thankfully its cheap enough to throw away which is what I will do and I suggest others do not buy it until proper instructions for use are available on this site.
Nothing as it does not work
Instructions impossible to follow
Response of the brand
Hi Tim, 

I'm sorry that the instructions for setting up the OnRhythm110 Heart Rate Monitor are not clear. 

Here are the instructions and some videos:


If you are still having trouble I can ask one of our product trainers to get in touch and talk you through the set up and use. 

Please don't throw away - as the product is covered by our 365 day "satisfied or satisfied" guarantee then you are welcome to return your HRM for a full refund. 

Kind regards, 

David Daker Commercial Director DECATHLON
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