The second generation Apple Watch may feature smart bands to add additional health tracking sensors to the device, Europe-based news website letemsvetemapplem.eu reported in August. The bands, which would attach to the watch hardware around the wrist, could feature a blood oxygen sensor, respiratory rate sensor, blood pressure sensor and temperature sensor, according to the report, citing sources.
The first-generation Apple Watch uses LED sensors built into the watch hardware to monitor blood flow and measure the user's heart rate. However, Apple's website says that many factors can lead to inconsistent readings with the current heart rate sensor, including skin perfusion, the type of activity or changes to the skin.
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