Oxymètre de doigt pour adultes Moniteur de saturation d'oxymètre Oxymètre de doigt portable Oxymètre numérique

Prompt deliveru and good product.

i had one before and this is perfect !

Works great, has an off switch too!

Just what I needed! Good quality!

Well, minor stuff first. The product listing is tagged with "food mill" somewhere, so all the notifications of shipping and whatnot were incorrectly labeled. More to the point, in the battery compartment both springs are on the same end, suggesting that the batteries should go in the same way round (they shouldn't). Finally, when I put it on my finger and push the 'on' button it powers up, sets all its numerals to dashes (presumably taring itself), then just turns off. I've had a pulse oximeter before, and there wasn't anything else to set or do, so I don't know if I've missed something or it's just not functional.