Key specs
Price
$599indicative US list price
Battery
30 dabout a month per charge, USB-C
Water resistance
5ATM / 50m (swim)
Subscription
Not required · Withings+optional, measurements and ECG work without it
not confirmed: exact battery figure, vendor copy says up to 30 days while one review says 35, connected GPS through the phone
What it tracks
Heart & vitals
Resting heart rateHigh accuracy
HRVtracked
Blood oxygen (SpO2)High accuracy
Respiratory rateHigh accuracy
Skin temperaturetracked
ECG recordingtracked
AFib detectiontracked
Sleep
Sleep durationHigh accuracy
Sleep stagesHigh accuracy
Sleep scoreHigh accuracy
Sleep apnea screeningClinical grade
Activity
StepsConsumer
Active minutesConsumer
CaloriesConsumer
WorkoutsConsumer
Floorstracked
Distancetracked
Fitness
Screening, not a medical diagnosis. This device offers ECG, AFib detection, SpO2. These are wellness screening features, not a substitute for a clinical evaluation.