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Prevention Circul+ Heart and Blood Oxygen Monitor [Bluetooth]

$31900 $34900
Size
30-day returns on most unopened items Ships with USPS and UPS Secure checkout Support by phone and email
HSA/FSA Eligible
Bluetooth Enabled
Why you'll love it
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Wearable ring. Worn on the ring, middle or index finger
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Overnight SpO2. Sleep mode records blood oxygen, heart rate and ODI
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Sleep stages. Awake, light, deep and REM for up to 12 hours
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Rechargeable. About 14 to 16 hours per charge, under 2 hours to recharge
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Phone app. Free CIRCUL+ app for iOS and Android

Specifications

TypeWearable ring pulse oximeter
TracksSpO2, heart rate, ODI, sleep stages, skin temperature, steps
SizesSmall 58 to 65 mm, Large 65 to 73 mm
Session memoryUp to 12 hours
Battery lifeAbout 14 to 16 hours
ChargingUSB Type A, under 2 hours
AppCIRCUL+ (iOS and Android)
Sleep SpO2 alarmSleep mode only
Circul+  |  SKU: 638
Customers rate us 4.6/5 based on 260 reviews.

Shipping & Returns

Returns are accepted within 30 days for unopened, unused items in their original packaging. Customers are responsible for return shipping.

Please note that some items, including select medical and diagnostic products, are final sale and not eligible for return.

View our full policy for complete details.

Description

Prevention Circul+ wearable ring pulse oximeter for sleep and heart rate

The Prevention Circul+ is a wearable ring pulse oximeter that tracks heart rate and blood oxygen (SpO2) through the day and overnight. In sleep mode it also records oxygen desaturation index, sleep stages and finger skin temperature.

Daily and exercise modes add steps and calories, and the free CIRCUL+ app on iOS and Android shows your reports. It comes in Small and Large for finger circumferences of 58 to 65 mm and 65 to 73 mm, and each session stores up to 12 hours.

The ring runs about 14 to 16 hours per charge and recharges in under 2 hours over USB. It is designed for wellness monitoring and recording, not emergency response or standalone diagnosis.

What's in the box
1xPrevention circul+ wellness ring (size chosen)
1xUSB charger
Choose Small or Large. The charger is referred to in Circul's setup instructions; the manufacturer does not publish a full packing list.

Frequently asked questions
What does it track?

Heart rate, blood oxygen (SpO2), oxygen desaturation index (ODI) in sleep, sleep stages, finger skin temperature during sleep, steps and calories.

Does it record ECG, HRV or blood pressure?

Not at present. Circul says single-lead ECG, HRV and blood pressure are coming through a free firmware update.

What sizes are there?

Small fits a finger circumference of 58 to 65 mm. Large fits 65 to 73 mm. Wear it on the ring, middle or index finger.

How long does the battery last?

About 14 to 16 hours of continuous use. A charge takes under 2 hours.

How long can it record?

It stores up to 12 hours per monitoring session, then stops automatically.

Is it a diagnostic or emergency device?

No. It is designed for wellness monitoring and recording, not emergency response or standalone diagnosis.

What phone do I need?

The CIRCUL+ app from the Apple App Store or Google Play. Keep the phone within 10 cm of the ring to connect.