Stainless steel shell: The COLMI R02 smart ring shell is made of stainless steel, which is highly corrosion-resistant, beautiful and comfortable to wear. Health function: COLMI R02 smart ring can monitor blood oxygen, heart rate, sleep, etc., and pay attention to your health. Sports recording: COLMI R02 smart ring can record your sports status and let you know your sports information at all times. Download
