COLMI R11 Ceramic

1. For best performance and accuracy, we recommend wearing the COLMI R11 on your index finger. 2. Please measure the circumference of your finger before purchasing, and make sure the rope or paper strip fits snugly against your finger, avoiding being too loose or too tight. (Please use a thinner piece of string or paper strip to measure the size. If the measuring tool is too wide, the measurement will be large.) 3. How to start: Use the included charging case to charge COLMI Ring. The heart rate light will light up to indicate successful startup. Then you can use the APP “Da Rings” to connect the COLMI R11. 4. The charging case of R11 has a protection mechanism, and it can only be charged when the cover is closed.