COROS Heart Rate Monitor, Comfort, Easy to wear, Auto-wear Detection, Precise Data, Bluetooth, 38 Hours Battery Life, Compatible with up to 3 Connections, for Run and Bike

The watch by itself does well. But even you add the band on and wear it above your bicep where you can see the veins. And this is definitely seemed to improve.

I like that the strap is small and comfortable and provides accurate HR. Sometimes my Garmin 945 wrist based HR will sync to my cadence when running instead of my HR, especially if it is cold or the watch is not super strapped down. While I make sure the arm strap is snug, since it is on my arm I do… Read more

Bought in February. First months I was as happy as everyone on the comments that just bought it. The place on the arm Coros suggests never worked for me. Always readjusting along the runs to get a believable reading. Today, Sept 6, my readings are inaccurate and very low. Like I woke up made an Olym… Read more

It fits my forearm very well. You don't feel any rubbing against the skin. It synchronised perfectly with my Garmin Forerunner 265 and the readings are much more accurate. When I synchronised it, I was able to do the lactate threshold test that's built into the watch. With this I could adjust my hea… Read more