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henDerSon-70 Author

Level 1

15 points

What is the red light under my Apple Watch?

What is the red light under wat

ch indicate?

[Re-Titled by Moderator]

Apple Watch Series 6, watchOS 7

Posted on Dec 19, 2021 10:55 AM

Top-ranking reply

Chris_V89

Community Specialist

Posted on Dec 20, 2021 11:36 AM

Hey there henDerSon-70,

Thanks for reaching out to the Apple Support Communities. We'd be happy to provide you with the best information on this question.

To get started, are you referring to the red light on the back side of your Apple Watch that rests against your wrist? If so, this light is used to help measure your heart rate and blood oxygen (if using an Apple Watch Series 6 or Series 7).

For more details, check out the information listed in the following resources below:

In the first resource you can find more information on the red light under the "About background measurements" section. In the second resource you can find more details on the light under the "How Apple Watch measures your heart rate" section.

We hope that's able to help.

Have a great day!

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What is the red light under my Apple Watch?

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