Colmi R02 smart ring in size 9 (18.9 mm inner diameter) — Black — is a compact wearable that provides continuous on‑finger monitoring of activity and basic health metrics. The ring measures heart rate, blood oxygen saturation (SpO2), sleep, steps, calories and distance, supports 21 sports modes and pairs with the QRing app via Bluetooth 5.0. With IP68 water resistance, a 17 mAh battery offering up to 6 days of operation and magnetic charging, the Colmi R02 is designed for everyday use while remaining lightweight (4.4 g) and slim (2.7 mm thickness).
Advantages
The Colmi R02 combines continuous heart rate and SpO2 monitoring with automatic sleep tracking and multi‑sport activity modes in a discreet, polished stainless steel exterior with a hypoallergenic resin interior. Its IP68 rating allows use in wet conditions, and the magnetic USB‑A charging cable enables a full charge in about one hour. The device synchronizes data to the dedicated QRing app for activity and health reports and settings.
Suitable for (tasks / use cases)
- Daily activity tracking (steps, calories, distance)
- 24/7 heart rate and SpO2 monitoring
- Automatic sleep tracking and sleep analysis
- Tracking chosen workouts from 21 sports modes (walking, running, cycling, yoga, etc.)
- Wearable notifications and discreet on‑finger monitoring
Key specifications
- Manufacturer: Colmi
- Model: R02 (size 9, 18.9 mm inner diameter)
- Color: Black
- Main control unit: RF03
- Bluetooth: 5.0
- Battery capacity: 17 mAh
- Operating time: Up to 6 days
- Charging time: Approx. 1 hour (magnetic charging)
- Waterproof rating: IP68
- Application: QRing
- Weight: 4.4 g
How to use
Place the ring on the intended finger (size 9, 18.9 mm inner diameter) and pair it with your smartphone using Bluetooth 5.0. Install the QRing app to synchronize measurements, view activity and health reports, and adjust device settings. Wear the ring continuously to enable automatic sleep detection and 24‑hour heart rate monitoring. Charge the ring with the supplied magnetic USB‑A cable; a full charge takes about one hour.
Usage recommendations
Wear the ring snugly but comfortably to ensure accurate sensor readings. For reliable SpO2 and heart rate measurements, keep the ring clean and positioned on a stable finger without excessive movement during measurement. Although the ring is IP68 rated, avoid exposure to high‑temperature water or chemicals and follow the app prompts for firmware updates and calibration.
