Inaccuracy

I want to return but there's no instruction for returning this product because it is malfunctioning.

Did not work at all.Would not turn on.

it is broken and never worked when arrive. overheated as soon as the battery is in. be careful with your fingers

The product did not work once I received it.

Had it for one day and it wouldn't turn on. Changed the batteries twice. Still nothing. Horrible buy.

It does not work

Waste of money it doesn't work.

Does not securely fit in patients finger . Is not accurate have only tried it once . Would return it if able.

While this initially worked great, it stopped working after only a few weeks. Don't waste your money.