OMRON M2 Eco is a compact, fully automatic upper arm blood pressure monitor, operating on the oscillometric principle. It measures your blood pressure and pulse rate simply and quickly. The cuff size is 22cm-32cm which makes it best fit for standard arms. It is not for big arms and does have not memory. The OMRON M2 Eco is a compact, fully automatic upper arm blood pressure monitor, operating on the oscillometric principle. It measures your blood pressure and pulse rate simply and quickly. This device is Clinically validated, meaning your result can be trusted and use to medical decisions.Now you can comfortably, quickly and accurately check your blood pressure and monitor your results easily. Monitoring is made easy with the fully automatic digital OMRON M2 eco which features Intellisense Technology for soft cuff inflation. It is so easy to use you can take readings with just one touch.