How does the heart rate sensor work?

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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. 

Fun Fact: this sensor was originally designed for the air force and astronauts so it is incredibly accurate! 

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