Professional SpO₂
Follow overnight oxygen trends.
JCRing Med X3
Advanced Smart Ring for Sleep, SpO₂ & Recovery
Professional SpO₂
OSA Risk Insights
Fuel™
AI Health Insights
$279.00 USD
Color
Black
Silver
Gold
Ring Size
Free Sizing Kit
Your selected JCRing Med X3 and a Free Sizing Kit are added to cart together. We ship the sizing kit first. After you confirm your final size with our support team, your Med X3 will ship.
01Receive your sizing kit
02Try your fit for at least 24 hours
03Confirm size with our support team
04Med X3 ships after confirmation
One purchase · X3 reserved as Size Pending · Free Sizing Kit included.
JCRing Med X3 sizes 7–14.
Quantity
Visa · Mastercard · Google Pay · Apple Pay·PayPal · Shop Pay
Works with JCRing Pro App — iOS & Android • No Subscription
Sleep · Recovery · Fuel™ · AI Health Insights
Sleep · Recovery · Fuel™ · AI Health Insights
Find Your Perfect Ring Size
A secure, comfortable fit helps maintain consistent sensor contact. JCRing Med X3 is available in sizes 7–14.
Not sure? Choose Free Sizing Kit. Your selected-color Med X3 and the sizing kit are added to cart together. We send the kit first, then ship your ring after you confirm the final size with our support team.
1
Measure Your Finger
Use an existing ring or measure the finger you plan to wear JCRing Med X3 on. Index, middle, or ring fingers are commonly used.2
Match Your Size
Compare your measurement with the chart below. If you are between sizes, use a JCRing sizing kit before confirming your order.| Ring Size | US Size | Inner Diameter (mm) | Inner Circumference (mm) |
|---|---|---|---|
| 7 | 6.5/7 | 17.4 | 54.2 |
| 8 | 7.5/8 | 18.2 | 56.7 |
| 9 | 8.5/9 | 19.0 | 59.2 |
| 10 | 9.5/10 | 19.9 | 62.0 |
| 11 | 10.5/11 | 20.7 | 64.5 |
| 12 | 11.5/12 | 21.5 | 67.0 |
| 13 | 12.5/13 | 22.3 | 69.5 |
| 14 | 13.5/14 | 23.1 | 72.0 |
JCRing Med X3 · Flagship Smart Ring
Professional SpO₂. Deeper Nighttime Insight.
Overnight Oxygen · Sleep · Recovery
JCRing Med X3 combines Professional SpO₂, OSA Risk Insights, sleep tracking and HRV patterns to help you understand your night more clearly.
- Professional SpO₂
- OSA Risk Insights
- Sleep & Recovery
Sleep & SpO₂ Insights
Understand More of Your Night.
JCRing Med X3 combines overnight SpO₂ trends, sleep tracking, HRV and OSA Risk Insights for a clearer view of nighttime wellness.
OSA Risk Insights
Review supported sleep-breathing patterns.
Sleep Insights
See duration, stages and HRV context.
OSA Risk Insights supports wellness awareness and is not intended to diagnose sleep apnea or replace professional medical evaluation.
Recovery
Know How Your Body Recovered.
JCRing Med X3 brings sleep, HRV and overnight body signals together to help you understand your recovery patterns.
Recovery Context
HRV
Resting Heart Rate
Sleep
Temperature
Follow how these overnight signals change from night to night for more context around rest and daily readiness.
Fuel™
Your Day. One Clear Signal.
Fuel™ brings sleep, recovery and activity patterns from JCRing Med X3 into one simple daily energy view, helping you understand your day at a glance.
Sleep
Recovery
Activity
Fuel™
Smart ring on your finger. Clearer understanding in the App.
90
Peak
Example Fuel™ states · App experience
Everyday Wellness
Beyond the Night. Understand More of Your Day.
JCRing Med X3 follows activity and stress patterns to add more context to how your body changes throughout the day.
Activity
01Move with more context.
Follow everyday movement patterns and see how activity fits into your broader wellness routine.
Steps
Active Minutes
Calories
Daily Movement
Stress & Mood
02Understand your daily balance.
See stress and HRV patterns in context and understand how your body's signals change throughout the day.
Stress Patterns
HRV
Daily Balance
Wellness Context
Women's Health
Understand Your Changing Patterns.
JCRing Med X3 brings cycle context and temperature trends together to help you better understand how everyday body patterns change over time.
01
Cycle Context
Follow cycle-related patterns over time.
02
Temperature Trends
See how nighttime temperature patterns change across your routine.
Women's Health insights are designed for wellness awareness and are not intended for diagnosis, fertility prediction, pregnancy detection, or medical decision-making.
Metabolic Insights
Understand Your Daily Energy Balance.
JCRing Med X3 brings activity, energy use and lifestyle patterns together to provide more context around your everyday metabolic wellness.
Calories
Daily Energy Use
Follow estimated energy use alongside everyday activity and movement patterns.
Nutrition Awareness
Lifestyle Context
Add nutrition awareness to the broader context of activity, energy and everyday wellness.
BGEM
Glucose Risk Insights
Review glucose risk assessment insights for additional wellness awareness.
BGEM provides glucose risk assessment insights for wellness awareness. It does not measure blood glucose values or diagnose medical conditions.
AI Health Insights
From Signals to Understanding.
JCRing Med X3 connects sleep, HRV, SpO₂, activity and everyday wellness patterns with AI-powered analysis for clearer health insights.
01
Body Signals
Sleep · HRV · SpO₂ · Activity
02
AI Health Insights
Patterns · Trends · Changes
03
VitalAge™
Long-Term Wellness Context
Long-Term Wellness
See the Bigger Pattern with VitalAge™.
Follow longer-term patterns across sleep, recovery, activity and everyday wellness.
Sleep
Recovery
Activity
Wellness Trends
JCRing Pro App
Your Body Insights. One Connected Experience.
See Fuel™, VitalAge™ and AI Health Insights together in one connected experience designed to make everyday body patterns easier to understand.
Sleep
Recovery
Fuel™
VitalAge™
AI Health Insights
Technical Specifications
Small Form. Serious Technology.
Precision sensors, titanium construction and long-lasting battery life, engineered for an everyday smart ring experience.
Sensors
PPG · Temperature · 3D Motion
Connectivity
Bluetooth 5.2 BLE
Material
Titanium Alloy
Water Resistance
5ATM
Battery Life
Up to 7 Days
Charging
<90 Minutes
3.4g
Weight
2.7mm
Profile
OTA
Firmware Updates
iOS + Android
JCRing Pro App
JCRing Med X3 FAQ
Frequently Asked Questions
Learn more about sleep, SpO₂, OSA Risk Insights, BGEM, battery life and the JCRing Pro App.
What is JCRing Med X3?
JCRing Med X3 is a smart ring designed to help users understand sleep, SpO₂ trends, recovery, activity and everyday wellness patterns through continuous sensing and AI-powered insights.
What health insights does JCRing Med X3 provide?
JCRing Med X3 provides insights across sleep, overnight SpO₂ trends, HRV, recovery, activity, stress patterns, calories, metabolic wellness, BGEM and VitalAge™.
Does JCRing Med X3 track sleep?
Yes. JCRing Med X3 tracks sleep duration, sleep stages, nighttime body signals and related recovery patterns, helping users build a clearer view of their sleep over time.
What are OSA Risk Insights?
OSA Risk Insights review supported nighttime signals to provide greater awareness of sleep-breathing patterns. They are not intended to diagnose sleep apnea or replace professional medical evaluation.
Does BGEM measure blood glucose?
No. BGEM provides glucose risk assessment insights for wellness awareness. It does not measure blood glucose values or diagnose medical conditions.
How long does the battery last?
JCRing Med X3 provides up to 7 days of battery life. Actual battery performance may vary depending on usage, sensor settings and connected features.
Is JCRing Med X3 water resistant?
Yes. JCRing Med X3 features 5ATM water resistance for everyday use and supported water-related activities.
Does JCRing Med X3 require a subscription?
No. JCRing Med X3 does not require a monthly subscription for the core wearable experience and wellness insights available through the JCRing Pro App.
Understand your night, recovery and everyday wellness with JCRing Med X3.
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