Wellue O2Ring-S
Quick details
Released
2026
Dimensions
38 x 30 x 38 mm
Display On-ring display
Battery life Up to 24 hours
Water resistance IP22
GPS No
Sensors Pulse oximetry, pulse rate, motion
Technical specifications
General
Release date 2026
Product type Wearable pulse oximeter ring
Physical size 38 x 30 x 38 mm
Weight 17 g
Water resistance IP22
Display type On-ring display
Battery Rechargeable lithium-polymer battery; 3.7 V
Battery life Up to 24 hours typical use
Charging USB-C charging
Charging time About 3 hours
Sensors
GNSS type None
GPS No
GALILEO No
GLONASS No
QZSS No
Beidou No
Accelerometer Yes (motion)
Gyroscope No
Barometric altimeter No
Compass No
Geomagnetic No
Optical heart rate Yes (pulse oximetry)
Electrical heart rate No
SpO2 Yes
Temperature No
Galvanic skin response No
Microphone No
Speakers No
Vibration motor Yes (SpO2 and pulse alerts)
Health & activity tracking
Steps No
Distance No
Floors No
Sports tracking No
Sleep Yes (overnight oxygen monitoring)
Heart rate Yes (pulse rate)
HRV No
Stress No
Blood oxygen Yes (continuous SpO2)
Respiration rate No
Skin temperature No
ECG No
Body composition No
Glucose No
Hydration level No
UV exposure No
Calorie intake No
Hyperglycemia risk assessment No
Arterial stiffness detection No
Pulse wave arrhythmia analysis No
Daily smart features
Smartphone compatibility iOS and Android
Storage 4 sessions, up to 10 hours each; 1-second stored data
Bluetooth Yes (Bluetooth 4.0 BLE)
Wi-Fi No
NFC / connected pay No
UWB No
Cellular No
Smartphone notifications Yes (app alerts while connected)
Bluetooth calling No
Smartphone music control No
On-board music storage No
Voice assistant No
Links
Affiliate link Wellue
These technical specs are correct to the best of our knowledge at the time of publishing.