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Level 1

4 points

green light on back of watch

What's the green light on the back of the watch?

Posted on Sep 13, 2021 4:01 PM

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Level 10

119,851 points

Posted on Sep 13, 2021 6:02 PM

That is your heart rate sensor. See the 'How Apple Watch measures your heart rate' section in:

Monitor your heart rate with Apple Watch - Apple Support

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Level 10

119,851 points

Sep 13, 2021 6:02 PM in response to bordetf

That is your heart rate sensor. See the 'How Apple Watch measures your heart rate' section in:

Monitor your heart rate with Apple Watch - Apple Support

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green light on back of watch

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