How does the heart rate sensor work?

How does the heart rate sensor work?

Vi measures heart rate using an optical heart rate sensor in the left earbud. The sensor emits light in a specific wavelength to the tissue of the tragus in the ear, and the reflective light is captured by the receiver of the sensor, that is processed by a proprietary algorithm to capture the heart rate. If you need assistance getting an accurate and consistent heart rate, check out this tutorial video to find the correct fit.
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