Colmi R09 Smart Ring - Health Sleep Monitor

Product received before the deadline. Everything is fine, as shown in the photo. All items are as advertised by the seller. I tested the product and everything is working as expected: heart monitoring, blood oxygenation, sleep (by the way, a note here: very accurate regarding the data collected) and body temperature. Very satisfied with the purchase.

Well packaged and works on the iPhone

I received it within the expected time, the color and size are just right... I am satisfied with the product. The only defect is that the battery only lasts 2 days, which might be due to the settings I used. But otherwise... it's beautiful, and from what I've identified so far, the sleep monitoring is very accurate.

Article very well packaged, of excellent quality, with Portuguese language support and super easy to install. I recommend it.

The O-ring fit perfectly on my finger, everything works perfectly. The delivery was super fast.

The ring is simply perfect. I bought it a bit hesitant, not knowing if it would arrive, but it arrived perfectly. It's original, comes with its protective cover, which is a little rubber thing, the ring charger, and the case, which is a cute thing. It measures very well what it promises: sleep, heart rate, SpO2, and sports, among others. I'm loving it. My measurement was spot on; as I saw it was bigger than a normal ring, I ordered the size 8 instead of the 9, and it fit perfectly on my index finger.

Very very fast shipping! Ordered it on a monday and it arrived on friday of the same week!

Great packaging and comes with accessories, app is also easy to install and use. So far so good, would recommend!

The ring is beautiful and functional, but getting the right size is a struggle.

Excellent

It’s a great ring, the app interface is good it just don’t get you an overview.

Apparently the battery lasts a long time, it's a bit big for me if you're wondering, it's the same size as the Samsung 13. The truth is it's quite comfortable, it was just my mistake regarding the size.

Very nice ring and works as described. Only thing is don't follow the size chart to buy the size, follow the standard sizing sytem. I am 6.5cm so i got size 8 and not size 11!! Be careful.

The truth is that it works well at the moment. The size corresponds to what was shown. I will buy again if everything goes well. Friendly and fast seller.

The ring is excellent and delivers what it promises; I recommend buying a size smaller than your actual measurement. It comes with a protective case for the ring, a finger circumference size gauge, a Type-C charging cable, and a cable for charging directly into the ring.

I'm in love with it. I've started using it a few days ago and I like it. The data is quite accurate, but I'm not looking for absolute perfection, just an average of my activities. The size is fine, it's one size larger than my usual size.

Works amazing. I wouldn’t spend my money on oura or ultrahuman, when you have this

This ring is very complex. The design is simple-elegant, slightly concave. The chosen color is black. Comfortable to wear. I recommend that you take the measurements in the size chart and choose correctly.
Now let's see what's in the box. The box is made of cardboard and even resistant inside we have a small and fine black recharge box with a status/charge led and on the outside and on the inside, perfect! In a separate box we find a usb cable a to c and another cable to charge directly the ring without a box, with a magnet. In addition, there is a kind of silicone protection and an adjustable finger measuring ring.
Now, what does this ring model know how to do: sleep monitoring, spo2, heart rate, stress, hrv, body temperature, activities (steps, steps, km travelled, exercises). The dedicated application seems to me to be detailed enough and with a beautiful interface, easy to set up and intuitive to use. I really like it and recommend it!

This ring is very complex. The design is simple-elegant, slightly concave. The chosen color is black. Comfortable to wear. I recommend that you take the measurements in the size chart and choose correctly.
Now let's see what's in the box. The box is made of cardboard and even resistant inside we have a small and fine black recharge box with a status/charge led and on the outside and on the inside, perfect! In a separate box we find a usb cable a to c and another cable to charge directly the ring without a box, with a magnet. In addition, there is a kind of silicone protection and an adjustable finger measuring ring.
Now, what does this ring model know how to do: sleep monitoring, spo2, heart rate, stress, hrv, body temperature, activities (steps, steps, km travelled, exercises). The dedicated application seems to me to be detailed enough and with a beautiful interface, easy to set up and intuitive to use. I really like it and recommend it!