Colmi R02 Smart Ring, Size 11, 20.3 mm, Black with Charging Case

The COLMI R02 Smart Ring, size 11 (20.3 mm), is a lightweight and discreet wearable device designed to integrate health monitoring and activity tracking into your daily routine. Finished in black, this smart ring features a durable titanium alloy exterior and a hypoallergenic resin interior, ensuring both longevity and comfort. It utilizes Bluetooth 5.0 to sync seamlessly with the QRing app, providing detailed insights into your wellness and fitness progress.

Advantages

The primary benefit of the COLMI R02 is its unobtrusive design, which allows for continuous, 24/7 wear without the bulk of a traditional smartwatch. Weighing only 4.7 g and measuring 2.7 mm in thickness, it remains comfortable during sleep, exercise, and daily tasks. The device automatically tracks vital signs and activity, storing data locally so you do not need to keep your smartphone nearby at all times. With an IP68 water resistance rating and a convenient magnetic charging case, it offers a reliable and low-maintenance experience for active users.

Suitable for

• Continuous heart rate and blood oxygen (SpO2) monitoring
• Tracking sleep stages and recovery quality
• Monitoring daily activity metrics such as steps, distance, and calories
• Recording workouts across 21 different sports modes
• Users who prefer a minimalist alternative to wrist-worn fitness trackers

When it may not be suitable

This device may not be ideal for users who require highly specialized medical-grade diagnostics, as it is intended for general wellness and fitness tracking purposes. Additionally, individuals who prefer a screen-based interface to view real-time data directly on their wrist may find a traditional smartwatch more convenient than a ring-based system.

Key specifications

• Inner diameter: 20.3 mm (Size 11)
• Material: Titanium alloy exterior, hypoallergenic resin interior
• Connectivity: Bluetooth 5.0
• Battery life: 6–7 days on a single charge
• Water resistance: IP68
• Compatibility: Android 4.4+, iOS 8.0+, Harmony OS
• Sports modes: 21

How to use

To begin, ensure the ring is fully charged using the provided magnetic charging case. Download and install the QRing app on your smartphone and enable Bluetooth to pair the devices. Once connected, the ring will automatically begin tracking your heart rate, blood oxygen levels, and activity. Wear the ring consistently to ensure accurate data collection, especially during sleep. You can synchronize the stored data with the app periodically to review your health trends and workout progress.

What to consider before purchase

• Measure your finger circumference accurately to ensure the size 11 (20.3 mm) fit is correct.
• Consider that measurements are most accurate when the ring fits snugly but comfortably.
• Verify that your smartphone operating system meets the minimum requirements for the QRing app.
• Note that the ring is designed for general fitness tracking and is not a substitute for medical equipment.

Usage recommendations: For the most accurate health data, wear the ring consistently throughout the day and night. Clean the inner surface regularly with a soft, dry cloth to maintain sensor performance and skin comfort.