I opted for the Chinese translation, dated 2022. In 2022, when used with an iPhone, it's fantastic. Recruited Expertise: Integral pulse oximeter validated by medical devices. The accuracy is good, with a margin of error of only 1% to 2%. Distinct drawbacks: Resting-only oxygen sensor. The driver's blood oxygen level is not shown. The iOS app does not support adding new screens. The in-box options provide zero value.
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