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R02 Smart Ring, a Smart Ring for Women and Men, with a Charging case, Supports Heart Rate, Blood Oxygen, Sleep Health Monitoring, and Sports Tracking Ring, No Subscription Fee. (Rose Gold, 7#) Rose Gold 7#

Quick facts

  • Brand: COLMI
  • Price: USD 55.98
  • Rating: 4.30 (133 reviews)

The COLMI R02 Smart Ring is a simple, subscription-free way to keep an eye on daily wellness and activity metrics without wearing a full smartwatch. Designed for both women and men, it tracks essentials like heart rate, blood oxygen, sleep, and everyday movement (steps, distance, and calories).

This version comes in Rose Gold and size 7, and includes a compact charging case so you can top up power on the go. It also adds a handy remote photo control feature to help with selfies and group shots.

Sizing tip: COLMI recommends purchasing a sizing kit or using the size chart before ordering to help ensure a comfortable fit and reduce the chance of returns or exchanges.

  • No app subscription fee required
  • Portable charging case included for convenient charging
  • 24/7 heart rate measurement
  • Blood oxygen monitoring
  • Sleep tracking with sleep quality and duration reports
  • Activity tracking for steps, distance, and calories
  • Remote photo control for your phone camera
  • Bluetooth connectivity; works with Android and iPhone

What’s in the box: smart ring, portable charging case, charging cable, and instruction manual.