Heart Rate Monitor, Comfort, Easy to wear, Auto-wear Detection, Advanced Sensor, Precise Data, Bluetooth, 38 Hours Battery Life, Connects up to 3 Devices at Once, for Run and Bike-Grey

I am using it with my coros watch and it's perfect match

Coros Dura is reliable, accurate, and easy to connect with. I've been using it for cycling and getting excellent results. I recommend Coros as it provides better outcomes with this device. The battery consumption is low, allowing you to trust it for up to 20 hours.

Excellent performance

My watch would often go into cadence lock and provide wrong HR data on easy to medium pace runs. This optical armband heart rate monitor from Coros seems to have resolved that issue. The heart rate data now coincides with the perceived effort. The band is pretty snug and comfortable and stays on the arm once strapped. It is an optical HR sensor with an inbuilt battery and, an advertised battery of 38 hours. The battery dropped by just 2% after a 3hr activity - battery life looks promising. Although it is basically just the same optical sensor on my Coros watch and does not come with any additional data or sensors. It would've been a nice addition if they'd included an HRV measurement or a thermometer.

Amazing

This heart rate monitor is designed to be worn on the upper arm. It seamlessly synchronizes with the watch and has an automatic on feature. It is user-friendly and hassle-free.

This doesn’t even work don’t recommended

Buy this watch only if you already have a smart watch and want to improve HR accuracy. If you do not have a smart watch , then the coros HRM will connect with the app but : 1. coros app will not receive the HR data 2. you need to use third party apps like Strava to receive data 3. Even with third party apps, you will have to manually start recording an activity to record HR 4. no 24/7 recording of I wanted to get my father a continuous 24/7 HR monitor (he had fitbit charge 6 which died within a year) and did the mistake of buying this device as a replacement ( In my defense - as of october 2025 the product details and various youtube videos mention that coros HRM can be used without a watch but they do not mention the lack of functionality in that setup ) I have had a great experience with coros pace 3. however with coros HRM its just a wrong purchase The device itself is probably good ( will update review after few months ) .

Game changer. I've been using chest straps for the last 15 years. Never really any issues other than batteries dying. Gone through Garmins and then maybe 3 wahoo ones. All fine I guess, the Wahoo's only seem to last a couple of years for some reason. Now, pre-setting the strap for these has always been just one of those things I did, either under a tap and embrace the chill when you put it on, or the spit and rub which always had a mildly kinky vibe to it :) Not to mention the more often than not coffee scented strap after a while. Then I finally cave a get this little switcheroo. I wasn't sure how good it would be using the same kind of system that watch based heart rate sensors use (which always seem to lock on to cadence for me). But this thing is solid. Comfy, requires no spit and means i can add a new weird tan line to my arm come summer. But in seriousness, it's accurate, connects to my suunto watch, (i've not used the coros app), is accurate and i honestly forget I'm wearing it. Plus being that it sits on my upper arm and not at the core of my body, it doesn't get anywhere near as sweaty in the heat.

Muy buen medidor de frecuencia, siento más confianza que con el reloj. Le dura mucho la pila y es muy cómodo

Good

Lätt att koppla ihop med min Garmin Forerunner 955 klocka. Allt fungerade direkt. Jag har tidigare haft ett vanligt pulsband runt bröstkorgen och detta är mycket smidigare, lätt att justera och sitter kvar på armen utan att behöva dra åt lika mycket som vanliga pulsband.

I was a part of a voluntary COROS HRM device testing program for two months ahead of the public release for this device, and was so impressed with the metrics it provided that I felt it valuable enough to buy as a gift for a fellow athlete. This quick review reflects my experience with the device during testing (and afterwards), and is not sponsored by COROS. About me: I’ve been an avid runner since 2012, trending towards longer endurance-based events. I’ve run a number of ultramarathons and a handful of 100 mile races. I also do a bit of road and indoor (stationary trainer) cycling as cross-training. Things I like: This HRM appeals to me because of its simplicity and versatility. I like that there are no buttons (it senses when it is being worn), and I like the fact that once you set the sizing, it stays put and is easy to slip on before an activity. For sizing: I’m 5’-9”, 160-ish, and I still have plenty of slack in the strap…but I don’t do a lot of lifting. It is SO much simpler and WAY less noticeable than a chest strap. I also love the magnetic charger–even though it is relatively short (and proprietary). Charging is quick, and the battery life is ample, so it won’t be charging for very long anyhow. Data accuracy: During testing I compared this new HRM to my Wahoo TICKR HRM, as well as data from wrist-based optical HR sensors (COROS Pace 3 and Apex 2 Pro watches). The short summary is that the most consistent data came from this COROS armband. The KICKR chest strap–while plenty accurate–was slower getting an initial reading before beginning an activity, and had some data drop-outs during the activity as well. Chest straps occasionally require adjusting during activities as they loosen and slip. Wrist-based HRM sensors work fairly well, but are somewhat activity dependent. Cycling (especially if venturing off-road) can jostle these sensors from wrist contact and can result in some inconsistent data too. The armband stays securely in place, and is so comfortable and light I often don't notice I'm wearing it. During testing there were data anomalies from all devices, but the armband HRM produced FAR FEWER than any of the others. Material thoughts: The armband material has held up well so far, but DOES tend to get stinky and discolored with wear. I’ve had mine since early July, and wash it with soap and water occasionally when I can’t stand the funk, and it cleans up nicely (see photos). Replacement armbands are also available, though I can't see needing one for a good while. Something I wrote to the product testing group during evaluation: “The more I run with both an arm and chest strap the more I LOVE the arm band. I’ve now got a rash from the chest strap and it drops signal more than any of the three HR options. I’ll admit that I’m a sucker for simplicity, so would normally just use readout from the watch (decent)…but if I need an accurate and responsive HR readout, I’m picking the HR31.” Summary: This armband doesn’t miss a beat (ha!) and makes a lot of sense for an athlete interested in reliable HRM data across multiple sports. I initially wasn’t too keen on adding another device to my quiver, but this HRM earned its place, and would be a worthy asset to those who value consistent accurate data across disciplines.