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Circular Ring
Choose your finish
Silver
Black Fit
Rose Gold
Gold
Choose Your size
I don't know my size
Purchase with Free Sizing Kit
Purchase with Sizing Kit
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How does it work?
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Get your sizing kit delivered to your doorstep just before the ring.
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To find your best fit, we recommend wearing the sizing ring for 24 hours.
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Confirm your size by following the instructions located inside your kit.
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Watch out! Find out if some size(s) for your product combination may not be available after your purchase:
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I know my size
Pick Your Size
Choose Your Size Manually
How to know my size?
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Get your sizing kit delivered to your doorstep just before the ring.
To find your best fit, we recommend wearing the sizing ring for 24 hours.
Confirm your size by following the instructions located inside your kit.
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Circular sizes are standard US sizes. Your current ring sizes match your Circular ring sizes!
You can easily find your size with the Circular Sizing Guide or with 3D rings that you can print!
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Circular sizes are standard. Your current ring sizes match your Circular ring size!
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You can easily find your size with the Circular Sizing Guide or with 3D rings that you can print!
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7
8
9
10
11
12
13
Watch out! Find out if some size(s) for your product combination may not be available after your purchase:
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7
8
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Extra Shell
Extra shell
Add an extra shell for your ring
Extra Cable
Extra Cable
Add an extra cable for your ring
Extra Charger
Extra charger
Add a second charger for an easy remote charging
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14 Day Return Period
Secure Checkout
Worldwide Shipping
Anticipated delivery: December 2022
Features
Blood oxygenationMedical grade SpO2 levels during sleep & rest periods.
24/7 Activity trackingAutomatically tracks your physical activities and provides recommendations for improvement.
Heart rate variabilityOne of the most important metrics for wellness and recovery monitoring.
Alarm clockWakes you up with vibrations. Also with smart alarm during your lightest sleep stage.
Sleep trackingAutomatically monitors your core sleep and naps to give recommendations on how to improve them.
Live measurementOn-demand spot measurement for HR, SpO2, HRV, activity intensities, and Max HR.
Heart rate tracking24/7 heart rate & morning resting heart rate.
Breathing rateBreathing rate during sleep periods.
TemperatureTemperature variations trends help detect fever, menstrual cycles…
Learn more
What's in the box
Circular Ring
Outer Shell
Charger
Technical specifications
Only 5 grams. Lighter than a standard ring.
Comes with a portable charger.
Up to 4 days of battery life.
Android and Apple compatible.
Forged on KEPLER-22B, assembled in France.
1 year warranty.

Sensors

  • 1 infrared LED sensor
  • 1 red LED sensor
  • 1 green LED sensor
  • 3 axis accelerometer
  • 1 surface temperature sensor

Active Feedback

  • A powerful vibration motor
  • A physical button

Materials

  • Exterior: High grade alloy of stainless steel and carbon fiber with coating
  • Interior: Medical grade non allergenic, non metallic and comfortable inner material

Finish

  • Black fit
  • Silver
  • Rose gold
  • Gold

Weight & Dimensions

  • Width: 9 mm
  • Thickness: 2.75 mm
  • Weight: 5 grams

Sizing

Water
Resistant

  • Suitable for rain, hand washing and showering

Battery & Power

  • Battery life; Up to 4 days
  • Full charge in one hour

Memory

  • Up to 10 days of data

Connectivity

  • Bluetooth Smart® (Low Energy)
  • Airplane mode

Compatibity

  • Free app on iOS and Android
  • Compatible with mobile devices that run iOS 11.0 or later, or Android 6.0 or later.