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Ian Prince Good to see your SpO2 reading is healthy 😁

Satoshi T Thank you @Ian 😁It's useful for early detection of COVID19 because you can know the decline of lung function...

Ian Prince And can be useful as a warning sign for a acute anemia. Most place here are out of stock for them...

Satoshi T The situation is similar here ...

EXIF data
Brand
Canon
Model
EOS 5D Mark II
Aperture
ƒ/8.0
Focal length
100mm
Shutter speed
1/6s
ISO
200