Product information: Color: Black 7# (charging case), Black 8# (charging case), Black 9# (charging case), Black 10# (charging case), Black 11# (charging case), Black 12# (charging case), Black 13# (charging case) Battery Capacity: 15–20 mAh Additional Features: Heart rate, blood oxygen, sleep tracking, fitness tracking, sleep monitoring Wearing Method: Finger-worn Packing list: Smart ring * 1+magnetic charging cable * 1+instruction manual * 1+charging compartment * 1 Product Image:

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