Based Arrhythmia Detection Technical and Feature Description Apple Watch has an optical heart sensor that uses green LED lights paired with light-sensitive ...

https://www.apple.com/jp/healthcare/docs/site/Apple_Watch_Arrhythmia_Detection.pdf

Using AirPods Pro 2 with iPhone and iPad to Help Protect, Assess, and Assist Hearing White Paper Using AirPods Pro 2 with iPhone and iPad to Help Protect, A...

https://www.apple.com/jp/health/pdf/Hearing_Health_Features_on_AirPods_Pro_2_October_2024.pdf