COLMI R02 11 black (with charging case)

The COLMI R02 is a black smart ring in size 11 (20.3 mm) that combines health monitoring with sports tracking. It measures heart rate and blood oxygen saturation (SpO2), analyses sleep, and tracks daily activity and workouts across 21 sport modes. Weighing just 4.7 g and 2.7 mm thick, it is light and discreet enough to wear around the clock without restricting hand movement during writing, manual work or exercise.

Measurements run automatically in the background, so there is no need to start each function by hand. Data is stored on the ring and synchronised via Bluetooth 5.0 with the QRing app, where results are shown clearly. Sleep tracking detects light and deep sleep phases and records total rest time, without needing a wrist device in bed.

The titanium alloy casing resists scratches, and the IP68 rating allows wear during hand washing and training. The package includes a charging case with magnetic contacts and a magnetic cable. According to the manufacturer, one full charge lasts 6 to 7 days.