The article says it can differ from cuff device reading by as much as 8mmhg, but cuff device itself can have lerger error if it is not weared on the hand correc

The article says it can differ from cuff device reading by as much as 8mmhg, but cuff device itself can have lerger error if it is not weared on the hand correctly. So if the figure in the article is correct, this would be very useful for people living alone to quickly get approximate measurment.