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