CMOS-processed optical sensor with three LEDs
https://www.epsglobal.com/Media-Library/EPSGlobal/Products/files/pixart/PAH8002EP-2P.jpg?ext=.jpg&maxsidesize=400
The PAH8002EP is a low power and high-performance CMOS-processed optical sensor with three LEDs: two Green and one Infrared (IR), and integrated DSP, targeted as a Heart Rate Detection (HRD) sensor.
PAH8002EP-2P
PAH8002EP-2P
Pixart
https://www.epsglobal.com/getmetafile/3e42d374-cf50-4012-9e85-842d0969c904/Pixart