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Editing Step 6 —

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With the rear cover removed, we get our first look at the photoplethysmogram (PPG) heart rate sensor.

A PPG is generated by shining light onto your skin and measuring the reflected light, tracking blood flow and therefore your pulse.

There are several markings as well:


Anatel ID: 1510-14-0711

Anatel is a Brazilian government telecommunications agency that approves devices for marketing and sale in Brazil.

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