Pairing with my Android smartphone was made without worries.
As against the measuring point is not the point: I have a measure of 4 works.
The other 3 times I have a "measurement error, please try again", which is very annoying, completely against-productive while you take tension!
What works seem to be nearly accurate (I also borrowed a pharmacy unit for comparing, that works every time), although somewhat below for systolic.
This may be a problem due to my camera, which was used / reconditioned.
I probably will note 4 or 5 if it was working properly.
I will return and take to the pharmacy to my specific needs.
