R02 Smart Ring, a Smart Ring for Women and Men, with a Charging case, Supports Heart Rate, Blood Oxygen, Sleep Health Monitoring, and Sports Tracking Ring. (Silver, 11#)
$6.99
| Package Dimensions | 3.94 x 3.15 x 0.79 inches |
|---|---|
| Item Weight | 3.53 ounces |
| ASIN | B0FKS8Y383 |
| Item model number | COLMI R02 |
| Batteries | 1 Nonstandard Battery batteries required. (included) |
| Customer Reviews |
4.1 out of 5 stars |
| Best Sellers Rank |
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| Date First Available | August 1, 2025 |
| Manufacturer | Shenzhen COLMl Technology Co., Ltd |
| Item Weight | 100 Grams |
| Memory Storage Capacity | 1 MB |
Warranty & Support
Product Warranty: For warranty information about this product, please click here
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Customers say
Customers find this smart ring to be of excellent quality, comfortable, and well-fitting. Moreover, they appreciate its functionality and value for money, with one customer noting it’s an affordable way to track fitness. Additionally, the ring effectively tracks steps and sleep patterns, and customers like its battery life, with one mentioning it lasts up to 36 hours on a single charge.
9 reviews for R02 Smart Ring, a Smart Ring for Women and Men, with a Charging case, Supports Heart Rate, Blood Oxygen, Sleep Health Monitoring, and Sports Tracking Ring. (Silver, 11#)
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R02 Smart Ring, a Smart Ring for Women and Men, with a Charging case, Supports Heart Rate, Blood Oxygen, Sleep Health Monitoring, and Sports Tracking Ring. (Silver, 11#)
$6.99
chris snyder –
What an amazing ring!
Amazing ring! It has tracked my every step, my sleep, and my heart rate and o2. It’s so good for the price!The battery lasts for at least a couple days I haven’t tested past that yet! It’s great! I got a size 9 and can wear it on my index or middle finger.
Julie Smith –
Simply AMAZING
AMAZING RING! The ring is so lightweight but still durable. The app is easy to navigate and I love that it syncs with the Apple health app. I also enjoy that it tracks overtime and puts it into a graph that is easy to read. I got the size 9 and can easily fit it on my index and middle finger.
Arelys –
Great Smart Ring for the Price
I’ve been using the COLMI R02 Smart Ring for a few days now and I’m genuinely impressed, especially considering its price point. It’s lightweight, comfortable, and tracks my heart rate, sleep, and steps surprisingly accurately. The battery lasts several days on a single charge, and I love that it’s waterproof so I don’t have to take it off all the time. If you want a stylish and affordable way to track your fitness, this is a great buy!
TLove –
Worst ring ever
This is the worst smart ring I ever purchased. It doesn’t have battery life so you don’t know when to charge it. The calories and steps walk is incorrect. I’m not sure about the sleep cycle since else is wrong. I will be returning and pray I can get my money back!
Amazon Customer –
Good smartring
I love the way the ring fits snug around my finger looks exactly like the “oura ring” which costs 500 dollars. The accuracy and durability is strong and amazing. The connectivity is good. And the sleep tracking feature works amazing.
Alex and V –
There must be a better device.
I wanted to like this ring. I bought the size that would fit over my right hand knuckle(right hand dominant) so that was a good fit. The fully charged battery lasted maybe 36 hours. That didn’t bother me. BUT reading my pulse at 99 while sitting reasonable still for an hour caused me to check my pulse elsewhere. It was 70 bpm by taking pulse and using my phone app.It did best at sleep tracking but I was paying more attention to the data while awake so that accuracy wasn’t what I needed most. I know what time I go to bed and when I waken. I had no issues connecting to the phone .I’ll keep trying.
Andrea de la Torre –
Smart ring
So far I have been using it for a few weeks. I like a lot of the features and the battery last a long time. The only thing that I don’t like is that , it doesn’t track my naps. I took a very long nap while wearing the ring and it didn’t track it. The app is so easy to use and the ring has been comfy. I sized upTemperature tracking would be a good plus!I think it’s worth it if you don’t have a smart watch and if you want to keep track of your steps/ sleep.Waterproof ✅Comfortable ✅Battery life ✅
Cassidy Allred –
Good quality for the price
Super comfortable and cute! Does exactly what described.
Amazon Customer –
The sizing was wrong and it takes forever to get to you even with prime and takes forever to get your refund