COROSHeart 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

UPDATE:I was contacted by COROS. With a few emails and providing a video of the issue, which was easy, they just sent an email with new order info. New unit on the way!!!! BTW, this unit has a 2 year warranty!!! I didn't know that, make sure to contact COROS to register your device. COROS stands behind their product !! Thank you COROS!Received HR arm band March 12th. Today May 8th, less than 2 months with a full charge, all monitoring works except heart rate. Use to have green flashing light when picked up to put on, but that is gone as well. Amazon troubleshooting ZERO help. Phone Number listed for Coros wearable says "your call can not be completed as dialed". So about $50/month to use this item. Can get NO HELP to rectify this. Totally UNACCEPTABLE.

Did not come with charger originally but the team at Coros shipped me one separately fairly quickly. Ran with the HRM for the first time last night and I prefer it way more than my chest HRM. This one feels more comfortable and I didn’t have to fool with it during my run like my other one

Una de las mejores inversiones que se puede hacer en la vida saber cómo funciona tu corazón con exactitud en una carrera, no importa si eres o no eres corredor profesional, no importa! Saber el estado de tu corazón incluso en una pequeña caminata o en el gym es una ventaja, trabaja con mucha exactitud. Y es súper cómodo de llevar!

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.

Recomendado

if you thought you'd be buying a better HR monitor since this one costs almost double the others on Amazon, well you'd be wrong.After 3 months of use - it doesn't work - the HR monitor shows a completely innacurate reading a few miles in to your ride. Starts dropping, despite you still climbing...Don't buy, their support team will tell you to reset it 5 times, ask for a fit file, and it still wont help it work anybetter.not only that, it doesn't have an on/off button so you have to jump through hoops to connect it, reset it, use it.just dont.

This heart rate monitor seems to read a bit low, but it's reasonably accurate. It's consistent though, so it works well for a relative indication of heart rate. Problem is, without accurate readings, the reports in the Coros app are pretty much irrelevant. Still, I like it and it works much better than wrist based monitors. I opted for the large strap, and I'm glad I did. I have 14.5" biceps and I had to open the strap up a ways to fit. One thing I don't like about the strap is that, in order to get it up on your upper arm, you have to pull on it and it tends to open up too easily resulting in a loose fit. Coros, if you're listening, you need to engineer a lock for the strap so that it remains in adjustment when putting it on and taking it off. Other than that, it's pretty slick.

Excelent product!