Used Polar OH1+ HRM but returned due to 'short' battery life of 12 hours, although it allows up to 200 hours of data storage for personal use which you could have downloaded later. I thought this Power Labs Bracelet HRM would be better since it has 60 hours of battery life, so I bought it. Found out that it only uses 2 green LEDs to get HRM data while Polar seems to be using 6! I found great reliability with the Polar OH1+ and apart from the 12 hour battery life I liked it. In addition, Polar uses an elastic wristband that fits snugly without affecting blood circulation in the arm. Power Labs doesn't use elastic, but what seems to me is a material that doesn't last long and degrades, although that's just my first impression. I checked it out and it hasn't given me any reliable heart rate data showing my heart rate going up to 180 when in a warm up state of around 100 bpm. The Polar OH1+ was in the same spot on my arm and gave great results and had the same tension. Cannot recommend Power Labs bracelet HRM. But instead a polar bandage. Now they have a newer model than the OH1+. Easily connect Power Labs to sports watches.
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