The best alternative for oura smart ring colmi R2 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.
Sleep monitoring
When you fall asleep, the ring can automatically monitor your sleep quality and generate a sleep report to help you develop good sleep habits.
Magnetic Charging Lasts Longer
24/7 Heart Monitoring
Blood oxygen test
Blood oxygen is one of the important indicators of human health. The smart ring COLMI R02 can record your blood oxygen data.
I purchased this ring to see how much sleep I am getting. I wear a size 7 and the size I ordered is comfortable for me. The ring charged quickly. I was able to download and pair it with the phone app easily. So far so good. It also records my steps and heart rate.
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Zelda Schroeder
nice, be sure you order correct size
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Mireille Howe
Ring works great and started monitoring my health.
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Shania Macejkovic
I like it. I ordered their largest size and it is soo good. It has more then a week battery. it charges fast.