COLMI Smart Ring R02 — Rose Gold (Size 8) Health Tracker with Heart Rate & SpO2 and Charging Case

The COLMI R02 Smart Ring is a compact wearable ring that tracks heart rate, blood oxygen, sleep patterns and daily activity, and charges in a portable case — no subscription required.

The COLMI R02 blends jewelry-style design with health and activity sensors to give discreet, 24/7 monitoring for men and women. Designed to sit comfortably on your finger, the R02 reports heart rate, SpO2 and sleep trends, stores daily activity data, and connects to your phone for remote camera control and easy syncing. A small charging case keeps the ring powered on the go, and there are no recurring subscription fees to access the core features.

How accurate is the COLMI R02 for heart rate and blood-oxygen readings?

The R02 uses optical sensors to estimate heart rate and peripheral blood oxygen. It’s designed for day-to-day wellness monitoring rather than clinical diagnosis, helping you spot trends and irregularities over time.

• 24/7 heart rate sampling with selectable monitoring modes (basic, balanced, enhanced).
• SpO2 measurements for quick oxygen-level checks during rest or activity.
• Algorithms filter out stationary hand movements to reduce false readings.
• Results sync with the companion app for trend visualization.

How long does the battery last and how does the charging case work?

Battery life depends on your monitoring frequency. Use the ring in Basic Mode for longer endurance or Enhanced Mode for continuous tracking at the cost of more frequent charging.

• Basic Mode: about 4–5 days (steps and basic sleep tracking).
• Balanced Mode: about 3–4 days (heart rate every 60 minutes).
• Enhanced Mode: about 2–3 days (real-time heart rate monitoring).
• Portable charging case provides convenient on-the-go recharges; includes charging cable.

Will the ring fit me and how should I pick a size?

Fit matters for comfort and accurate sensor contact. COLMI strongly recommends using the sizing kit or measuring your finger against the size chart before ordering to avoid returns.

• Purchase the COLMI sizing kit or follow the provided size chart for exact measurements.
• A snug but not tight fit improves sensor contact and data quality.
• If you’re between sizes, choose the larger size for comfort during longer wear.
• Ring includes a user manual to guide setup and sizing tips.

What additional features and accessories come with the R02?

Aside from health tracking, the R02 offers convenience tools and reliable after-sales support. The package contains the ring and essentials to get started immediately.

• Remote camera control to take photos from your phone with a finger gesture.
• Nighttime-focused sleep analytics calibrated to record continuous night rest.
• Package contents: 1 smart ring, 1 portable charging case, 1 charging cable, 1 instruction manual.
• No app subscription fee — core features available without recurring payments.

Who is this for? The COLMI R02 is aimed at style-conscious users who want unobtrusive, daily wellness and activity insights without a subscription. It suits people who prefer a jewelry-like wearable instead of a wristband, travelers who value a compact charging case, and anyone tracking general trends in heart rate, SpO2 and sleep. If you need medical-grade measurements, consult a healthcare professional; for everyday monitoring and lifestyle metrics, the R02 is a practical, fashion-forward choice.