This is the FemTek BBRing: a smart ring designed for menstrual health. The Basal Body Ring can track your heart rate, heart rate variability, and SpO2 and basal temperature. It is compatible with iOS and Android devices.
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This gadget takes up to 15000 skin measurements overnight. It has a dual sensor design to account for changes in room temperature and ensure accurate readings. The battery lasts for 2 full nights of sleep.
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