It's not as accurate as other's.

Checked Pulse Oximetry and Heartrate. There was no invoice inside the package. I expect one.

Unfortunately I cannot fully rate as it did come with batteries.

Great

Waste of money, just go to the store and buy one!

This product does not read very well, got it for my dad to use and I used it on myself (35) years old and it said my oxygen sat was 84% which I know isn't right!!

Takes a while to get a reading. Very slow. But ok. Not the greatest.

Battery NOT INCLUDED, takes 2 AAA, FYI !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Me llego quebrado y ya no lo pude devolver

I don’t always have time to read 100% of the details, but assumed batteries were there. No. Spent more time looking thru packaging than I needed to