Title: Works, for a while...
Product review: When its working, it is fairly accurate, within 1 or 2 bpm. Unfortunately, after about 20 minutes of constant sweaty use, it stops working right. HR reading spikes up to 220+, the heartbeat monitor on the watch face blinks way faster than my heart is beating. Its not interference, since this happens indoors and outdoors. I dont sweat too much. I've tried different placements on my chest, adjusted the strap, nothing. After 20 or so minutes, it just goes haywire.
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