Choice the leading Australian consumer watch dog evaluated 14 automatic blood pressure monitors, testing for accuracy and ease of use (for blood pressure monitors ranging from $70-$180). 
One in seven Australian adults suffers from some form of high blood pressure, or hypertension (as it’s known medically). If you’re one of them, monitoring your condition regularly at home with a blood pressure monitor can be useful. 
There are three types: automatic arm, automatic wrist and manual arm. Automatic models inflate the cuff automatically, whereas manual models require you to inflate it yourself by pumping a bulb. The UA-851 from AD Medical scored 88/100 with comments like “excellent performance” from the Choice evaluation. With the highest score the UA-851 was awarded “CHOICE Recommended” status in the report.
Have a look at A&D's CHOICE Recommended UA-851 HERE