Colmi R12 Smart Ring 17.9mm 7 (Black)

Colmi R12 is a smart ring 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 can 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 wakefulness - 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.

Sport 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 17.9 mm 7 (black) smart ring is designed for users who want discreet health and activity monitoring without wearing larger smart devices. It is best suited for daily use to track movement, sleep and basic measurements, but the small size of the ring makes it suitable for those who are bothered by other wearable products. Due to the limited volume, the amount of functions may not reach the level of smartwatches, but this is precisely the advantage for anyone who values simplicity and convenience. Before purchasing, it is crucial to check the correct size and compatibility with your phone, as this is the only way to ensure accurate measurements and a good user experience.

Recommendation source: Enaa guides and team experiences.

User view

Such a smart ring is often chosen by anyone who wants unobtrusive health and activity monitoring even when a watch or bracelet is not the most practical. It is especially suitable for people with an active lifestyle, athletes and those who appreciate minimalism and discreet design. Users emphasize the practicality of wearing it during the day, where comfort is key, as well as the consistency of basic functions, such as sleep monitoring and daily activity.

For many users, it is also an advantage that the Colmi brand is already established among affordable wearable devices, where a balance between usability and modern trends is often found.

Why buy at Enaa

At Enaa, you can expect accurate information about the compatibility of smart rings with phones, a quick overview of various models in one place, and reliable customer and user experiences that also help when choosing smaller and lesser-known technology products.

Answers to frequently asked questions

What should I check before buying the Colmi R12 smart ring?

It is important to check the size for your finger and compatibility with your phone (Android or iOS), as this directly affects comfort and the operation of basic functions.

Is the Colmi R12 waterproof for everyday use?

The ring is designed to withstand contact with sweat and occasional water, but is not intended for use while swimming or prolonged exposure to water.

Can I use Colmi R12 even if I don't want to receive notifications?

Even without notifications via phone, the ring will still record basic activities such as steps, sleep, and heart rate, so it is also suitable for users who only want to monitor their health.

What about data synchronization and the application?

The smart ring works in conjunction with an application, where collected activity and sleep data are visible. The operation of individual functions depends on the type of phone and operating system version.

Description updated: April 2026