Every detail, measured & made.
From the medical-grade sensors in its inner rim to the ceramic-coated titanium shell, every number below describes the same promise — precision you can feel, nothing you can't.
ECG-logo capsule
CAERING One
A ring that knows you, without saying a word.
The brushed-silver capsule set into the band carries an engraved ECG waveform — CAERING's signature, and the contact point for on-demand heart-rhythm readings. Around it, twin optical channels and a precision thermistor work continuously while you live normally.
- Twin-channel PPG with green, red and infrared emitters
- ECG electrode with medical-grade signal chain
- Skin-temperature sensing to ±0.1 °C
- On-device processing — readings stay private
Ring parameters
The complete specification.
- Model
- CAERING One — first generation
- Ring sizes
- US 5 through 13, including half sizes (sizing kit included)
- Band width
- 7.9 mm
- Band thickness
- 2.3 mm at the widest point
- Weight
- Approx. 2.1 g, depending on size
- Optical heart sensing
- Twin-channel PPG — green, red & infrared emitters with paired photodiodes
- ECG
- Single-lead electrocardiogram via the engraved ECG-logo capsule
- Blood oxygen
- On-demand SpO₂ readings through the red / infrared channel
- Skin temperature
- High-sensitivity thermistor, resolution ±0.1 °C
- Motion
- 3-axis accelerometer + gyroscope for activity and rest classification
- Battery life
- Up to 7 days of typical continuous monitoring
- Charging
- Full charge in approx. 40 minutes; a 20-minute top-up covers several days
- Water resistance
- 5 ATM — rated for swimming and showering down to 50 metres
- Operating temperature
- −10 °C to 50 °C
- Wireless
- Bluetooth 5.3 low energy, with ultra-low-power background sync
- Compatibility
- iOS 15 or laterAndroid 9 or later
- Updates
- Over-the-air firmware improvements, delivered silently
- Data protection
- End-to-end encrypted sync; on-device processing before anything leaves the ring
- Shell
- Grade-5 titanium with a scratch-resistant ceramic outer coating
- Inner liner
- Medical-grade hypoallergenic ceramic — zero direct nickel contact
- Finishes
- Midnight CeramicChampagne GoldRose AuroraPlatinum Silver
Model & fit
Sensing systems
Performance
Connectivity & privacy
Materials & finishes
Arriving at your door
In the box.
The CAERING One, hand-finished in the colour you chose.
Compact magnetic dock with braided USB-C cable.
Arrives first, so the ring we ship fits precisely.
A soft, lined pouch for the ring when it charges away from home.
Complete coverage, with personal support from real people.
A quiet guided setup, on your schedule — no account noise.