1. Introduction
The COLMI R12 Smart Ring is an innovative wearable device designed to integrate smart technology with daily life. Featuring a display screen and touch controls, it offers comprehensive health management, activity tracking, and smart control functionalities. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your COLMI R12 Smart Ring.
The R12 utilizes the latest display technology, with a screen and touchpad built directly into the ring. This allows you to browse your health statistics with simple gestures, making your smart ring both responsive and stylish. It supports wireless charging for convenience and offers continuous monitoring of heart rate, sleep patterns, and activity levels. Its 5ATM water-resistant design ensures durability for everyday wear.

Product overview video demonstrating features like health tracking, smart control, and waterproofing.
2. What's in the Box
Upon opening your COLMI R12 Smart Ring package, you should find the following items:
- COLMI R12 Smart Ring
- Wireless Charging Base
- USB Charging Cable
- Quick Guide (User Manual)

3. Setup Guide
3.1 Power On and Initial Charge
To power on your COLMI R12 Smart Ring, simply place it into the provided wireless charging base. The heart rate light on the ring will illuminate, indicating that it has successfully started up and is charging. Ensure the charging base is connected to a power source via the USB cable.
3.2 App Installation
To unlock the full potential of your smart ring, download the companion application, QRing. You can find the app on the App Store (for iOS devices) or Google Play (for Android devices).

3.3 Wearing Method and Sizing
For optimal performance and accuracy, it is recommended to wear the COLMI R12 on your index finger, middle finger, or ring finger. Choose a comfortable size that fits snugly without being too tight or too loose. Ensure the sensor on the inside of the ring is in contact with your skin for accurate heart rate and blood oxygen measurements.
To determine your correct ring size, follow these steps:
- Step 1: Take a long non-elastic rope or paper, and wrap it around your finger.
- Step 2: Make the rope or paper fit closely to your fingers to avoid being too loose or too tight, which may cause size deviation.
- Step 3: Mark the junction part on rope or paper.
- Step 4: Lay the rope or paper flat, and measure the length. It is recommended to measure multiple times for more accurate data.

Refer to the size chart below to match your measurement to the appropriate ring size:

| Size | Diameter (cm) | Circumference (cm) | Diameter (inch) | Circumference (inch) |
|---|---|---|---|---|
| 7# | 1.79 | 5.5 | 0.71 | 2.17 |
| 8# | 1.83 | 5.75 | 0.72 | 2.264 |
| 9# | 1.91 | 6 | 0.752 | 2.362 |
| 10# | 2 | 6.28 | 0.787 | 2.472 |
| 11# | 2.08 | 6.54 | 0.819 | 2.575 |
| 12# | 2.16 | 6.79 | 0.85 | 2.673 |
| 13# | 2.23 | 7 | 0.878 | 2.756 |
The above dimensions all have a measurement tolerance of ± 0.2mm.
4. Operation
4.1 Display and Touch Control
The COLMI R12 features a multi-functional display screen. You can easily check the current time, steps, heart rate, and battery level without frequently taking out your phone or watch. Simply click on the ring's display to switch between different content. A long press allows you to switch between left and right hand wearing modes.

4.2 Health Tracking
The R12 Smart Ring is equipped with precision biological sensors to achieve accurate health monitoring. After wearing the ring, it continuously tracks and measures your heart rate, blood oxygen, and sleep patterns. All data is linked with the mobile phone APP (QRing), allowing you to monitor your health trends and develop good living habits.
- Heart Rate Monitoring: Provides 24/7 heart rate data, including average, minimum, and maximum values.
- Blood Oxygen Monitoring: Tracks your blood oxygen levels.
- Sleep Monitoring: Analyzes your sleep patterns, including light sleep, deep sleep, and REM, to help you understand and improve your sleep quality.
- Stress Monitoring: Measures stress levels to help you manage daily pressures.

4.3 Activity and Sports Tracking
The ring supports multiple sports tracking modes, recording real-time data for various activities. This includes:
- Walking
- Running
- Cycling
- Hiking
- Spinning bike
- Rope skipping
- Elliptical machine
- Yoga
- Basketball
- Volleyball
- Badminton
- Aerobics
- Kayaking
- Roller skating
- Tennis
- Football
- Golf
- PingPong
For each exercise, the ring can record real-time heart rate, exercise steps, exercise distance, calories burned, exercise time, and other relevant exercise data, which can be viewed in the QRing app.

4.4 Intelligent Control Functions
The COLMI R12 offers intelligent control at your fingertips through simple gesture control:
- Mobile Phone Photography: A light wave of the hand can control your mobile phone camera to take photos.
- Short Video Control: Scroll up and down on platforms like TikTok with a simple gesture.
- Music and Games Control: Seamlessly connect to your smartphone to control music playback and games.

4.5 Intelligent Counting Function
By clicking the multifunctional button on the ring, you can easily record your daily prayer counts at any time, with data viewable in the app.

5. Maintenance
5.1 Waterproofing
The COLMI R12 Smart Ring boasts a 5ATM waterproof rating. This means you can confidently wear it while washing your hands, taking a shower, or swimming in the sea. The ring is designed to continue monitoring your health even when completely wet.

5.2 Cleaning and Care
To maintain the ring's performance and appearance, clean it regularly with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials that could damage the stainless steel and epoxy resin casing. Ensure the charging contacts on the ring and base are clean and dry before charging.
6. Troubleshooting
If you encounter issues with your COLMI R12 Smart Ring, refer to the following common problems and solutions:
- Ring not powering on or charging: Ensure the ring is correctly placed in the wireless charging base and the base is connected to a working power source. Check the USB cable for damage and try a different power adapter if necessary. The heart rate light should illuminate when charging.
- App not connecting to the ring: Make sure Bluetooth is enabled on your smartphone and the QRing app is open. Ensure the ring is sufficiently charged. Note that the app typically connects to one ring at a time.
- Inaccurate health data: Verify that the ring is worn snugly on your finger (index, middle, or ring finger recommended) and the internal sensors are in direct contact with your skin. Ensure your app is up to date.
- Ring display not responding: Try clicking the display to switch content. If unresponsive, place the ring on its charger to restart it.
- Compatibility with iPhone: Yes, the COLMI R12 is compatible with iPhones via the QRing app.
- Payment functionality: The COLMI R12 is a health and activity tracker and does not support payment functionalities like Google Pay or Google Wallet.
- Temperature measurement: The COLMI R12 does not feature temperature measurement.
7. Specifications
Detailed technical specifications for the COLMI R12 Smart Ring:
| Feature | Specification |
|---|---|
| Model Number | COLMI R12 |
| Waterproof Grade | 5ATM |
| Display Screen | Yes |
| NFC Support | No |
| Activity Tracked | Activity Tracker, Steps Tracker, Distance Tracker, Calorie Tracker |
| Metrics Measured | Heart Rate Monitor, Sleep Monitor, Blood Oxygen Monitor, Stress Monitor |
| Item Weight | About 3.3g |
| Case Material | Steel (Stainless steel shell + epoxy resin) |
| Certification | CE, FCC |
| Origin | Mainland China |
| Brand Name | COLMI |
| Battery Capacity | 15mAh (for sizes 7#~9#), 18mAh (for sizes 10#~13#) |
| Ring Battery Life | 5-7 Days |
| Standby Time | 15 Days |
| Chipset Model | RTL8762 ESF |
| Heart Rate Sensor | Vcare VC30F-S |
| Sensor | ST LIS2DOC |
| APP | QRing |
Wireless Charging Dock Parameters:
| Feature | Specification |
|---|---|
| Size | 47*16mm |
| Color | Black |
| Charging Port | Type C |
| Material | Plastic cover + zinc alloy bottom shell |

8. User Tips
- For the most accurate health data, wear the ring on your index finger.
- Always measure your finger circumference carefully before purchasing to ensure a comfortable and effective fit.
- The ring's display is multi-functional; a quick tap cycles through time, steps, and battery, while a long press changes wearing modes.
- Utilize the companion QRing app for in-depth analysis of your health and activity data.
- The ring's gesture controls can be used for convenient remote control of your phone's camera, music, and short video apps.
- Remember to keep the ring and charging base contacts clean for efficient wireless charging.
9. Warranty and Support
COLMI products are engineered and manufactured with high-quality materials and undergo rigorous quality testing. For authentic products and reliable support, it is recommended to purchase devices only from the official COLMI store or authorized retailers.
For more detailed information, including comprehensive warranty details and advanced troubleshooting, please refer to the full user manual available in PDF format: COLMI R12 User Manual (PDF).
Brand Story
COLMI was established in 2012 with the slogan: "Your first smart watch." The brand aims to provide cost-effective smart electronics, focusing on young and simple yet sophisticated designs.