Don't waste your money!
This item is very toy like and small.  The first one I got did not work at all with new batteries (would not turn on).  The second one they sent is an average of 20 to 25 mm too high for both diastolic and systolic readings as compared to doctors office I took it with me.  Don't waste your time or money on this one.  Too cheap to work properly.
Rating: 1 stars