All Omron blood pressure monitors are clinically proven accurate. They are clinically validated to be within the following:
– Blood pressure: within +/- 3 mmHg or 2 percent
– Pulse: within +/- 5 percent of reading
This meets or exceeds the AAMI (Association of Medical Instrumentation) standards. To understand the accuracy levels of other manufacturer’s blood pressure monitors, you need to contact them. It is always important to investigate accuracy & ease of use before purchasing a home blood pressure monitor.