Ring Health Tracker for Women Men, Fit Ring with Heart Rate,Blood Oxygen, Stress, Sleep Monitor,Calories, Step Counter, IP68 Waterproof Smart Ring for iPhone & Android, No Subscription Fee (Gold, 8#) Gold 8#
A lightweight Tiantianka smart ring that tracks sleep, heart rate, blood oxygen, stress, steps, calories and more—IP68 waterproof, iPhone/Android compatible, and no subscription required.