Smart ring Colmi R12 20MM 10 (black)

Colmi R12 is a smart ring equipped with an LED display, health monitoring sensors and gesture control functions. It monitors heart rate, blood oxygen level, sleep and physical activity 24 hours a day. It supports various sports modes and allows you to remotely control your smartphone. With 1 ATM water resistance, you can wear it in the shower and while swimming, and the battery provides up to 5 days of operation or up to 15 days in standby mode. The included charging station will allow you to quickly and conveniently restore the power of the device.

Easy-to-read display

The built-in LED display, located directly on the ring, lets you quickly view key information – without having to reach for your phone. You can check the current time, number of steps taken, battery level and current heart rate. This is especially useful in situations where using a smartphone is inconvenient or impossible – such as when cycling or exercising.

24/7 health and activity monitoring

Colmi R12 is equipped with advanced biological sensors that analyze heart rate, blood oxygen level (SpO₂), sleep and stress levels 24 hours a day. Heart rate is measured in real time, and the ring is able to detect even small changes, allowing for a better understanding of the body's reactions in different situations. Sleep quality is assessed based on its phases - light, deep and awake - and the data is presented in the application in the form of clear graphs. This allows you to monitor your habits and take concrete measures to improve your well-being and recovery.

Sports modes and exercise tracking

The ring supports multiple exercise modes – including walking, running, cycling or swimming. During activity, the Colmi R12 records your heart rate, distance covered, number of steps, exercise time and calories burned. This allows you to accurately monitor your progress and better plan your workout. The data collected by the ring is synchronized with the app, giving you access to daily, weekly and monthly statistics.

Easy gesture control and practical functions

The Colmi R12 also lets you control your smartphone with gestures. With a simple hand movement, you can scroll the screen in apps like TikTok or take a photo remotely with your phone. This feature comes in handy when taking selfies or videos without touching the screen. The ring also allows you to manually count repetitions, for example during prayer, affirmations or exercise. Simply press the button on the case to record the next event - this data is also saved in the app.

Robust design

Colmi R12 has a water resistance of 1 ATM, which means that you can easily use it while washing your hands, bathing and even swimming in the sea or pool. In addition, the built-in rechargeable battery allows you to use the ring for about 5 days, depending on the intensity of use. In standby mode, the operating time is extended to 15 days. A charging station is included, which allows for easy and quick charging without cables.

Included

• smart ring
• charging base
• USB-C to USB-C cable
• user manual

Same summary

The Colmi R12 20MM 10 (black) smart ring is suitable for anyone who wants to discreetly monitor their health, activity and sleep without a large device on their wrist. It is particularly attractive to users who like the lightness and unobtrusiveness of smart rings in everyday life or during sports. Before purchasing, it is worth checking the size, as it is crucial for the accuracy of measurements and comfort when wearing - the wrong size may reduce the usability of the product. It is also recommended to check the compatibility with your phone, as not all functions are always supported on all devices or operating systems.

Recommendation source: Enaa guides and team experiences.

User view

Colmi R12 smart ring users are often those who value the ability to track basic health data and daily activities discreetly. The ring is popular among tech enthusiasts, young people, and people with fast-paced lifestyles who want a simple solution to track sleep, exercise, or receive notifications without an additional wrist device. Its design also appeals to those who don't like traditional smartwatches or want something unusual in their technology.

Users often choose Colmi products because the brand is known for its affordable and practical wearable devices designed for everyday use without complicated upgrades.

Why buy at Enaa

On Enaa you can find selected smart rings from trusted manufacturers in a wide range - so you can easily compare models that best suit your habits and needs. The professional team ensures accurate product descriptions so that your expectations are completely clear before purchasing. Reviews from other users additionally help you gather information about the real use of the product.

Answers to frequently asked questions

How do I choose the right size for the Colmi R12 smart ring?

The correct size is a prerequisite for accurate measurements and wearing comfort. Before purchasing, we recommend measuring the circumference of your finger and checking it in the size chart provided by the manufacturer.

Can I use the Colmi R12 with all smartphones?

The Colmi R12 ring is suitable for most mobile phones with Android or iOS operating systems, but check the minimum application requirements regarding the system version, as some features may not be available on older devices.

Is the ring waterproof for showering or sports?

The product is generally resistant to sweat and occasional exposure to water, but for prolonged use in water such as swimming or showering, we recommend paying extra attention to the water resistance specifications.

What should I do if the ring doesn't fit correctly?

First, check that the ring is properly installed and the size fits your finger. Sensor cleanliness and app updates can also affect the accuracy of the data.

What battery life can I expect with intensive use?

Autonomy depends on the intensity of use and the functions enabled, but with smart rings it is usually shorter when synchronizing multiple times or constantly monitoring activity.

Description updated: April 2026