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Quantity
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CIRCUL is a pulse oximeter ring that can be worn comfortably day and night as a continuous blood oxygen and heart rate monitor. Contrast this with a traditional bulky finger clip oximeter that covers most of your finger tip or may have a co...
Reviews
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Great product
Happy with this ring vs diligently rellying on my FitBit major inaccuracies detected.
A
Ariel · April 2, 2026
Best insight on sleep
I’m so thankful for this ring, and it gives me great insight into my sleep, activity, and even blood pressure. The only con is the charger. You have to get the pins just right for it to charge, and it takes pinpoint precision to get it just right.
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Mike · December 21, 2023
Love this high tech ring— never seen anything like it before and it seems to work very well!