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Why Green Lights on Back of Apple Watch (Turn OFF/ON)

The green lights on the back of your Apple Watch come from the heart rate sensor. They use these lights to measure your pulse by shining light into your skin and detecting blood flow. The lights turn on whenever the watch is actively tracking your heart rate or during certain workouts, and they turn off when the sensor isn’t in use.

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Видео Why Green Lights on Back of Apple Watch (Turn OFF/ON) канала Topical Talks
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