Colmi R02 Smart Ring Size 9 18.9mm with Charging Case - Black

The COLMI R02 Smart Ring in size 9 (18.9 mm) is a compact health and activity tracker designed for continuous use without interfering with daily life. It integrates biometric monitoring, sleep tracking, and multi-sport activity measurement into a discreet wearable form factor suitable for 24/7 wear.

The ring continuously measures heart rate and blood oxygen saturation (SpO2), providing background monitoring without manual activation. It automatically tracks sleep cycles, including light and deep sleep stages, and records total sleep duration to help assess recovery quality. It also supports 21 sport modes, enabling structured tracking of different physical activities such as walking, running, and general workouts. Key metrics such as steps, distance, calories, and exercise time are recorded and stored.

Data is saved locally and synchronized via Bluetooth 5.0 to the QRing mobile application, where users can view detailed trends and long-term changes. The titanium alloy exterior provides durability, while the hypoallergenic inner lining ensures comfort during extended wear, including overnight use. Its slim and lightweight design allows uninterrupted daily use without discomfort.

With IP68 water resistance, the ring can be worn during handwashing, exercise, and water exposure. Battery life lasts 6–7 days per charge, and the included magnetic charging case enables fast recharging in about one hour. It is designed for continuous, low-profile health tracking without the need for larger wearable devices.