Smart ring, heart rate blood oxygen tracking ring, sleep monitoring IP68 waterproof photo exercise

Color: black 8/16 inch, black 9/18 inch, black 10/20 inch, black 11/23 inch, black 12/25 inch, silver 8/16 inch, silver 9/18 inch, silver 10/20 inch, silver 11/23 inch, silver 12/25 inch, gold 8/16 inch, gold 9/18 inch, gold 10/20 inch, gold 11/23 inch, gold 12/25 inch, rose gold 8/16 inch, rose gold 9/18 inch, rose gold 10/20 inch/ 20 inches, rose gold 11/23 inches, rose gold 12/25 inches
Applicable to: Adults
Battery capacity: 15mAh
Compatible platforms: Android, Apple
Additional functions: step counting
Wearing method: wear
Applicable system: Android, Apple, Hongmeng
Packing list: packaging, manual, charging cable, ring.