How to choose a monitoring mode

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Daily mode can be selected for blood oxygen monitoring less than 4 hours during the day, and choose sleep mode for blood oxygen monitoring when sleeping for more than 4 hours or at night; select exercise mode for monitoring exercise heart rate and step counting during exercise; once you turn ...

How to view real-time blood oxygen monitoring data

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Open the APP and connect the ring, wear it on a suitable finger, and keep the hand steady without shaking, you can see the real-time blood oxygen and heart rate data after about 20 seconds; if the hand shaking during monitoring will affect the normal monitoring and accuracy.

The ring can be used by multiple people

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The ring can only be connected to one mobile phone account by Bluetooth for one person to use at the same time.If the ring is not connected by the original mobile APP account, it can be bound and used with other newly registered accounts.

If need to wear the spacer ring

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It is recommended to wear the spacer ring before wearing the CIRCUL to prevent the ring from being too close to the finger root, which will affect the SpO2 accuracy for some people; if you can get basically the same test results without wearing the spacer ring, you don’t need ...

Which finger is good to wear ring

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Suggest to wear ring on Ring finger、Middle finger or index finger, which is a tightly fitting finger and will not rotate easily. Too loose will lead to poor sensor contact, and too tight will hinder blood flow, which will affect accuracy.

How to choose the size of the ring (L or S)

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Use a cloth ruler or a thin thread to measure the circumference of a finger If the circumference is between 58 and 65 mm, choose the small S size. If the circumference is between 65 and 73 mm, choose the large L size.

How to wear a ring

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Reach finger in the direction of the ring white arrow; When detecting, the sensor at the red light part of the ring contact with finger pulp; wear it on middle part of third knuckle of finger with proper tightness(please check the wearing method in the manual).

Charging time and battery life

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The green light flashes mean in charging, and a solid green light on mean full charge. The longest charge time is less than 2 hours; after full charge, it is recommended to remove the ring from the charging adapter in time to prevent battery wasting for solid green light reason; ...

CIRCUL can not be recharged

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1. The charging current of power bank or laptop   is not enough to charge the ring 2. If the ring is not used for a long time, the battery will be depleted severely. It will take 3-5 minutes to initiate charging before the green light flashes, indicating that the ...

APP cannot connect to the CIRCUL

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1. Check whether the ring is charged fully 2. The distance between CIRCUL and Mobile is within 10cm for bluetooth connection 3. Check whether the Bluetooth function of the mobile phone is turned on 4. Whether the Bluetooth permission of the APP in the phone settings is turned on 5. ...