Traduzione in corso passo 3
Passo 3
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A quick checkup on the all-ceramic-and-sapphire-crystal back details:
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Watch, check.
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Series 4, check.
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A laundry list of features, including water resistance to 50 meters.
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Optical sensor, right in the middle this time.
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Big ring-shaped electrical sensor—that's new.
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Inside one of the wrist band slots, we find a new model number, A2008—and in the other, the serial number, plus a small air vent hole for pressure equalization.
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