PEAKME Wrist Blood Pressure Monitor

I tried using this several times in a row. I got different readings every time. They were all 99% lower than my normal blood pressure. I probably would not have tried it more than once had the first one not been so far off. One time it would read 121/78/75. The very next reading one to two minutes later would be 103/67/78. I even had a few that were under 100!!! My normal is around 132-136/85/80 which is why I wanted to monitor it. I just ordered an arm cuff. I googled the difference between the two and almost 100% of them said to buy the cuff instead of the wrist band. It's too bad it didn't work. It is easy to use and has a good display. Feel badly that is did not work properly.