Smart Ring R10 Womens Men Electronic Smartring Blood Oxygen Health Monitor Sleep Monitor 5ATM Waterproof Fitness Tracker Ring Size:12 The function and efficacy of

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Smart Ring R10 Womens Men Electronic Smartring Blood Oxygen Health Monitor Sleep Monitor 5ATM Waterproof Fitness Tracker Ring Size:12 The function and efficacy ofSPECIFICATIONS Activity Tracked: Steps Tracker,Calorie Tracker,Distance Tracker Battery Capacity(mAh): 14mAh Case Material: Alloy Certification: ce Choice: yes Display screen: No High concerned chemical: None Metrics measured: Heart Rate Monitor,Blood Oxygen Monitor,Sleep Monitor,Stress Monitor,Body Temperature Monitor Model Number: R10 NFC Support: No Origin: Mainland China Waterproof Grade: 5ATM semi_Choice: yes type 1: smart ring r10 type 10: smart