I am 5 days into my weeks test with an Omcron M2 blood pressure meter and it is amazing what differences there are in the readings and I suppose it depends on what activity (if any) you have been engaged in before taking the readings and what you have eaten. I won`t bore you with all 18 readings taken so far but I will give you the highest and lowest. 178 over 90 and 126 over 61. Quite a variance there. I will strive to get as near as possible to te lower of the two readings. Kenny