Amazfit Helio Smart Ring Titanium Alloy Heart Rate Sleep Monitor Size 8

• Amazon now offers the Amazfit Helio Smart Ring in titanium alloy with heart rate and sleep monitoring, size 8, now $99.99 (list price $149.99).
• Prime members get free two-day shipping, and regular members get free shipping on orders over $35 within the contiguous U.S.
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Editor's Pick: Wear it while you sleep, and in the morning you'll see a clear breakdown of deep sleep, light sleep, and awake time, along with heart rate variability—no more guessing how well you rested. During the day, stress levels are reflected in the app via sensors, and it will remind you to adjust your pace when you're feeling tense. The titanium alloy build is super lightweight, so it won't weigh down your finger, and you can keep it on while washing your hands or showering. Charging is quick—it fills up in just over an hour—and there's no subscription fee, which is a nice bonus.

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