Monitor heart rate, blood oxygen, temperature and other physical data around the clock Provide comprehensive sleep monitoring and give professional sleep advice. Sports data measurement Multiple sports modes Exercise pedometer Comprehensive health monitoring Heart rate monitoring blood oxygen monitoring Body temperature measurement Full scene sleep guard , sleep quality sleep advice Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Colour:B: gold Material:Metal Size:Diameter:20.6mm Package Contents: 1 x Smart Ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.