I use to review items for some sellers a few years back and here is one I liked and here was my review on the item.
The Wrist blood pressure monitor works great for me. It tells you your heart beat and pulse levels. It has a easy to read big light up in blue screen. It is easy to use. Just un Velcro it, put it around your wrist and push the on button. It well then start working and in a few sec’s later it will tell you your blood pressure and heart rate and your pulse.
I have tested this with 2 other arm ones I have and all 3 was about the same reading. It has setting to remember your last readings and other settings as well. It also has a time and date on it. It is well made and awesome quality. It works great does not hurt with testing you levels. It comes in a reusable carry case to keep it looking and working great. It does take 2 AAA batteries and they are included.