With the release of the Apple Watch Series 2, the original Apple Watch has been replaced with the "Series 1"—a new model with a snappy dual-core processor.
The back of the Series 2 is adorned by a familiar quartet of optical polymer lenses protecting a set of LEDs and photodiodes.
Both series offer the same set of interchangeable bands for easy customization. If only every component could be this easy to replace...
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