minus-squareOld_Laugh_2239@alien.topBtoApple•Why is my watch making me glow red and why is it so brightlinkfedilinkEnglisharrow-up1·1 year agoIt’s measuring your blood oxygen concentration. Red light gets shot into your arm and the light that gets reflected back to the sensors, tells the watch what your O2 concentration is. linkfedilink
It’s measuring your blood oxygen concentration. Red light gets shot into your arm and the light that gets reflected back to the sensors, tells the watch what your O2 concentration is.