Photo 1 of Smart Ring, Fitness Tracking Smart Ring with Calories/Heart Rate/Blood Oxygen/Sleep Monitoring, IP68 Waterproof,No App Subscription, with Charging Case, APP for iOS & Android (Black, sizes-9#)

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Photo 1 of Smart Ring, Fitness Tracking Smart Ring with Calories/Heart Rate/Blood Oxygen/Sleep Monitoring, IP68 Waterproof,No App Subscription, with Charging Case, APP for iOS & Android (Black, sizes-9#)Photo 2 of Smart Ring, Fitness Tracking Smart Ring with Calories/Heart Rate/Blood Oxygen/Sleep Monitoring, IP68 Waterproof,No App Subscription, with Charging Case, APP for iOS & Android (Black, sizes-9#)