Photo 1 of Smart Ring with Calories, Heart Rate,Step Counter, Heart Rate & Blood Oxygen Monitor, Sleep Tracking, and IP68 Waterproof - No App Subscription, Compatible with Android 5.1+ & iOS 8.0 (Black, 9#)

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Photo 1 of Smart Ring with Calories, Heart Rate,Step Counter, Heart Rate & Blood Oxygen Monitor, Sleep Tracking, and IP68 Waterproof - No App Subscription, Compatible with Android 5.1+ & iOS 8.0 (Black, 9#)Photo 2 of Smart Ring with Calories, Heart Rate,Step Counter, Heart Rate & Blood Oxygen Monitor, Sleep Tracking, and IP68 Waterproof - No App Subscription, Compatible with Android 5.1+ & iOS 8.0 (Black, 9#)