ONRHYTHM 310 access watch and coded HRM strap red

    Designed for athletes who want to measure their heart rate for fitness improvement

    More details
    SKU: S11580 (1859245)
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    Delivery in 7 to 8 days

    € 32.48
    Characteristics Designed for athletes who want to measure their heart rate for fitness improvement
    Product Benefits
    1. Parameter measurement
      Stopwatch, heart rate (BPM and %HRmax), calorie and fat expenditure.
    2. Ease of use
      Ease of use
      Coded analogue transmission: no crosstalk with surrounding monitors
    3. Waterproof
      Watch: 5 ATM (swimming) - Chest strap: 1 ATM (water splashes).
    4. Coaching
      Target zones: Heart rate (BPM or %HRmax), kcal.
    5. Easy reading
      Wide screen. 2 data lines. Simple navigation.
    Product feature
    1. Measurement set-up
      Stopwatch, heart rate (BPM and %HRmax), instant and total calorie expenditure, burnt fat (grams)
    2. Target zones
      You can set up target zones 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 310 access features a mode that lets you set up heart rate target zones (BPM or %HRmax) and calorie expenditure target zones (kcal/h)
    3. Watch
      Time, date, alarm, backlight
    4. Heart rate monitor
      The coded signal (5.3kHz) avoids crosstalk with other heart rate monitors when practising in a gym or with a group.
    5. Memory
      Latest session display.
    6. Compatibility
      Compatible with Gcoded HW cardio belts (included).
    7. Battery
      Watch: CR2032 included - Belt: CR2032 included
    8. Seal
      Watch: 5 ATM (swimming) - Chest strap: 1 ATM (water splashes)
    9. Pack content
      ONrhythm 310 access HRM watch + plastic cardio Gcoded belt + instruction leaflet
    Product testing
    1. Composition
      Wrist : 90.0% Polyurethane (PU), 10.0% Stainless steel Structure : 70.0% Polycarbonate - Acrylonitrile Butadiene Styrene (PC-ABS), 30.0% Stainless steel Inside room : 100.0% Printed Circuit Board Lens : 100.0% Polymethyl Methacrylate (PMMA)
    2. Product catchline
      All indicators for fitness improvement. Its coded signal prevents cross-references with other HRM devices.
    Product reviews
    3.7 / 5
    14 reviews
    14 users recommend this product
    Write a review
    • Good value but not always reliable

      Donald (United Kingdom)
      Used for
      Been using this for a couple of weeks and so far am fairly pleased. Easy to set up and use for interval training. The problem is the heart sensor doesn't stay reliably connected to the watch. Every time I use it I get a beep to say the connection has been lost after 45-60 minutes use. This is sometimes accompanied by the message, 'strap low', on the watch display. The manual is no help- have put a new battery in the heart sensor but problem persists :(
    • Atractive price-range, but not so in use

      Debanjan (India)
      Used for 2 to 8 weeks
      After a thorough study in the market, when I had this cute piece of gadget, I was excited to have a test run with it. My decision for going for this product is obviously the price tag. It was even a special discount day in my local Decathlon outlet (Howrah, India). But soon I started getting disappointed. This watch was not able to receive signals from the chest strap.
      So next week I had to return to the store. They said probably I was not wearing the chest strap properly. So had a trail inside the store and it did work. I was excited again and constantly checking the reading for around another coupe of hours.
      But the more I explored more I'm getting frustrated with this product. I tried this in various places with various conditions and my conclusion is that the signal from chest strap is not so strong or has problem of interfering with other signals around.
      If I'm using this in a open ground or remote places or something like this, there is no issue at all. But as soon as I'm in front of any noisy area (with lot of signals - mobile towers, inside a server room etc) the chest strap is not at all work and the watch always complains about no signal. Even inside my home gym it refuses to work.
      Hence I feel the purpose of HRM is gone and I'm looking for moving to Fitbit or Polar or Garmin products.
      Price, better built than other HRM in this price
      Frequent Signal issue between watch and cheststrap
      Response of the brand
      Hello Debanjan,

      Thank you for taking time out to share your feedback about our heart rate monitor - OnRhytm 310

      I apologise that you have had an unpleasant experience with the product. I have passed on your feedback to our product development team. 

      I propose that we replace this product with an alternative heart rate monitor or we can process a refund. 

      Priya Jalakam Brand Manager DECATHLON
    • Great watch/HRM

      Gerry (United Kingdom)
      Used for 2 to 8 weeks
      Great value for money and I think better than the similar Polar product as the battery in the heart strap can be changed when flat ( after 18m approx use). Polar has to be sent to workshop where the battery replacement was to cost me £30. This watch and heart strap cost less than the polar repair quote.
      Heart strap has replaceable battery
      Instructions not easy to understand
    • Connecting to a PC

      T (United Kingdom)
      Used for 2 to 8 weeks
      Is it possiblt to hook up this HRM to a PC in order to store workout information? I love this watch, but don't really see the point if you can't track your progress or workouts.
    • Not Accurate and little over complicated

      Steve (United Kingdom)
      Used for 2 to 8 weeks
      All in all we are not very happy. Partner has a polar FT4 and considering the price difference isn't huge really regret not going for that one.
      Inaccurate, complicated to navigate around
      Response of the brand

      Thanks for taking the time to give us your feedback regarding the Onrythm 310 Heart Rate Monitor, I'm sorry to hear that you are not happy with this product.

      If you need further instructions I invite you to go on the link below where you will find videos on how to use the watch itself and adjust your personal settings:


      If you are still unsatisfied with the HRM you can always get it exchanged or fully refunded at your closest Decathlon branch.

      Have a good evening,

      Kind Regards

      Cyrille Simon UK Market Manager DECATHLON
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