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R7 Fitness Smart Ring Stainless Steel Case, Heart Rate SpO2, Female Health, Magnetic Charging Cable. IP68 Waterproof Smart Ring, supports heart rate, SpO2 & multi-dimensional sleep monitoring. Built-in female health & stress tracking, with remote photo & video control function. Bluetooth 5.2, stainless steel+ABS shell, CE & FCC certified, 5 days standby time.