THE DETAILS
Advanced Insight in Every Detail
Deeper Oxygen Awareness
Advanced optical sensing tracks blood-oxygen patterns alongside heart rate, helping you see how breathing, rest, and daily activity may influence your overall wellness.
Built Around Better Signals
Positioned directly on the finger, XONYL Ultra captures clean PPG readings through a multi-sensor system that also includes skin-temperature and motion sensing.
Premium Performance, Day and Night
A lightweight titanium body, seven-day battery life, 5ATM water resistance, and wireless charging make XONYL Ultra ready for continuous daily and overnight wear.
OXYGEN & SLEEP
Understand What Happens While You Rest
XONYL Ultra brings blood oxygen, overnight heart rate, breathing patterns, and detailed sleep stages into one connected view—helping you recognize nighttime changes that ordinary activity tracking may overlook.
Overnight SpO₂ Tracking
Oxygen Variation Trends
Sleep Apnea Risk Insights
Nighttime Heart Rate
YOUR HEALTH
A More Complete View of Your Wellness
XONYL Ultra connects advanced oxygen monitoring with sleep, cardiovascular, recovery, fitness, and emotional-wellness insights—bringing your most meaningful daily and nightly trends into one clear app experience.
Heart Rate
Advanced Sleep
Blood Oxygen
VO₂ Max
Nighttime HRV
Mood & Stress
GOT QUESTIONS
Frequently Asked Questions
How does XONYL Ultra track blood oxygen?
XONYL Ultra uses optical sensing to measure changes in blood oxygen from the finger, where blood vessels sit closer to the skin than at the wrist. This placement helps the ring capture clearer signals during both daytime and overnight use.
Can XONYL Ultra identify possible sleep-breathing concerns?
XONYL Ultra reviews overnight blood oxygen, oxygen variation, heart rate, and sleep patterns to provide sleep-apnea risk insights. These wellness insights are not a substitute for professional medical diagnosis.
Can XONYL Ultra alert me when my blood oxygen drops?
Yes. The connected app can be configured to notify you when overnight blood-oxygen readings fall below a selected threshold.
What sleep information does XONYL Ultra track?
It tracks sleep duration, deep sleep, light sleep, REM sleep, body movement, overnight heart rate, blood oxygen, and oxygen fluctuations to create a more detailed view of your rest.
How does XONYL Ultra measure nighttime HRV
XONYL Ultra analyzes the timing between heartbeats while you sleep, creating an HRV view that can help you understand recovery, stress, and overnight cardiovascular patterns.
Can XONYL Ultra estimate VO₂ Max?
Yes. XONYL Ultra uses activity and cardiovascular data to estimate VO₂ Max, helping you understand aerobic fitness, physical capacity, and longer-term performance trends.
How long does the battery last?
XONYL Ultra provides up to seven days of battery life under typical use and takes less than 90 minutes to recharge. Actual performance may vary with usage and ring size.
Can I wear XONYL Ultra while swimming or showering?
Yes. XONYL Ultra has a 5ATM water-resistance rating, making it suitable for everyday water exposure and swimming under normal conditions.
UNDER THE HOOD
Tech Specifications
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