[* black] OnWe turn our attention to the back side,of the Watch'scase, where we find a ceramic cover with sapphire lenses that protects a specially designed heart rate monitor/LED combo stare back at us with its four eyessensor that uses infrared and visible-light LEDs and photodiodes.
[* black] TheAlongside the edge opposite the digital crown has a couple holes. We're guessing they'recrown, we spot the speaker and microphone ports.
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