Specifications
- Hign-concerned Chemical-None
- Waterproof Grade-5ATM
- Model Number-COLMI R03
- Display screen-No
- 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-4.4g
- Case Material-STEEL
- Battery Capacity-(mAh)15mAh(#7,#8,#9), 18mAh(#10,#11,#12,#13)
- Certification-ce,FCC
- Origin-Mainland China
- Brand Name-COLMI

Description
1. For best performance and accuracy, we recommend wearing the COLMI Ring on your index finger. If you prefer other fingers, the middle and ring fingers are also OK. Avoid using fingers that are narrower than the knuckles at the base.
2. The size of COLMI rings may not be completely in line with universal standards. Please measure your finger circumference before purchasing and make sure it fits comfortably, then choose the appropriate size.
3. How to start: Charge the COLMI Ring with the included charging cable. The heart rate light will light up to indicate successful startup. Then you can use the APP Qring to connect the COLMI Ring.