Heart Rate Blood Pressure Blood Oxygen Sleep Monitoring Waterproof W8 Smart Ring

Product information:
Color: No. 8 Black Gold, No. 9 black gold, No. 10 black gold, No. 11 black gold, No. 12 black gold, No. 13 black gold, No. 8 silver gold, No. 9 Silver gold, No. 10 silver gold, silver gold No. 11, silver gold No. 12, 13
Battery capacity: 20 ma
Additional features: health monitoring