Colmi R02 Smart Ring Size 12 21.3mm with Charging Case - Black

The COLMI R02 Smart Ring in size 12 (21.3 mm) is a compact health and activity tracking wearable designed for continuous, unobtrusive use. It combines biometric monitoring, sleep analysis, and multi-sport tracking in a minimal form factor intended to be worn day and night without discomfort.

It measures key health indicators including heart rate and blood oxygen saturation (SpO2), while also providing automatic sleep tracking that identifies sleep stages and overall rest quality. In addition, it supports 21 sport modes, allowing structured tracking of various physical activities such as walking, running, and general workouts. All collected data is stored locally and synchronized to the QRing mobile application via Bluetooth 5.0, where it can be reviewed in detail for long-term trend analysis.

The ring is constructed with a titanium alloy outer shell for durability and a hypoallergenic inner lining for comfort during prolonged wear. Its lightweight design ensures it does not interfere with daily tasks such as typing or physical work. With IP68 water resistance, it can be worn during handwashing, workouts, and exposure to water without issue. Battery life ranges from 6 to 7 days per charge, and the included magnetic charging case allows convenient recharging in approximately one hour.

Overall, it is designed for users who want continuous health insights without wearing a watch or larger device.