Beware of false advertising - NOT for babies
At the time I purchased this product, it was advertised as a "Baby Pulse Oximeter" in the title, and still seems to be advertised that way under the Product Description, as well as using infants in the advertisement.  I bought it when my daughters, 1 year old and 2 years old, and I had Covid.  It did work on my 2 year old if I laid it flat, got her finger in just the right position, and she stayed still, which for a 2 year is difficult, especially because it takes a long time to get a reading.  I had to take multiple readings to get comfortable.  It did not work at all for my 1 year old because her fingers were too small for it, which was a bummer.  I'm still glad I have one to use in the future, but bummed it didn't work for what I intended it to at the time.
Rating: 3 stars