COLMI Smart Ring R02 — Rose Gold (7#), Continuous Heart Rate & SpO2 Tracking with Charging Case

The COLMI R02 is a compact smart ring with continuous heart rate, blood oxygen and sleep tracking, delivered with a portable charging case and no subscription fees.

The COLMI R02 smart ring combines understated jewelry styling with wearable health and activity monitoring for both women and men. Designed to sit comfortably on your finger, it records heart rate trends, SpO2 estimates, and nighttime sleep patterns while syncing to your phone — all without requiring a recurring app subscription. A dedicated charging case keeps the ring powered on the go and the rose gold finish adds a refined look for daily wear.

How accurate is the COLMI R02 for everyday heart rate and blood oxygen monitoring?

The R02 provides continuous heart rate monitoring and periodic blood oxygen (SpO2) estimates suitable for daily wellness awareness and trend spotting. It is optimized for everyday conditions rather than clinical diagnostics, helping you track changes over time.

• 24/7 heart rate measurement with adjustable sampling modes (Basic, Balanced, Enhanced)
• Intermittent SpO2 readings to show relative oxygen levels during daily life
• Algorithms filter out common motion to improve reading stability

What battery life and charging options does the smart ring offer?

Battery life varies with how often sensors sample data: Basic Mode stretches usage, while Enhanced Mode requires more frequent charging. The included compact charging case lets you recharge the ring away from a power outlet and store it securely when not in use.

• Basic Mode: approximately 4–5 days (steps and basic sleep)
• Balanced Mode: approximately 3–4 days (hourly heart rate sync)
• Enhanced Mode: approximately 2–3 days (continuous heart rate monitoring)
• Portable charging case and cable included for on-the-go power

Which day-to-day features help with activity and sleep tracking?

The R02 tracks daily movement patterns using arm-swing detection, and its sleep algorithm is tuned for nighttime rest to produce consistent night sleep summaries. These features focus on long-term trends so you can spot improvements or shifts in activity and rest.

• Step counting and long-term activity trend reports
• Nighttime sleep staging tuned for consistent overnight insights
• Motion filtering to reduce false readings from hand-only movements

Can the ring control my phone and what accessories are included?

Yes — the COLMI R02 supports remote camera control so you can trigger photos with a finger gesture, ideal for selfies and group shots. The package comes ready to use with everything needed to start tracking immediately.

• Remote photo shutter control from the ring for convenient captures
• Included items: 1 smart ring, 1 portable charging case, 1 charging cable, 1 instruction manual
• Free of monthly app subscription fees — full core functionality available out of the box

Who is this for? The COLMI R02 smart ring is tailored for people who want discreet, jewelry-style wearable tech that monitors activity, heart rate, SpO2 trends, and sleep without ongoing subscription costs. It suits users seeking a low-profile alternative to a wrist device, frequent travelers who benefit from the charging case, and anyone who values trend-based health data rather than clinical diagnostics. Before buying, consider ordering the COLMI sizing kit or measuring your finger to ensure a comfortable fit and reduce the chance of returns.