COLMI R02 9 black (with charging case)

The COLMI R02 is a black smart ring in size 9 (18.9 mm) that weighs just 5 g. It combines health monitoring with sports tracking: heart rate and blood oxygen saturation (SpO2) are measured automatically in the background, while sleep analysis records light and deep sleep phases. Daily activity and workouts are tracked across 21 sport modes.

The ring is designed for all-day wear. At 2.7 mm thick, it is easy to forget while writing, working or training. With IP68 water resistance, it can be worn while washing hands, sweating or bathing. Data is stored on the ring and synced later via Bluetooth 5.0 with the QRing app.

The battery lasts six to seven days depending on use. The included charging case serves as a charging dock, and a full charge takes about one hour.