Smartwatches use a flashing green light to measure your heart rate and a red and infra-red light to measure your oxygen saturation. The way it works is really clever, and this video demonstrates that.
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The bizarre flashing lights on a smartwatch#
technology #
health #
smartwatches #
heartrate #
SpO2![Imagem/foto](https://i.ytimg.com/vi/BFZxlauizx0/maxresdefault.jpg)
Get your first month of KiwiCo free: #^https://kiwico.com/stevemouldSmart watches use a flashing green light to measure your heart rate and a red and infarred ...