OMRON M4 intelli upper arm blood pressure monitor is a painless and easy to use monitor, which operates on the observation of oscillations in the cuff pressure caused by the oscillations of blood flow. . OMRON M4 intelli upper arm blood pressure monitor is a painless and easy to use monitor, which operates on the observation of oscillations in the cuff pressure caused by the oscillations of blood flow. OMRON'S M4 intelli monitors contains an intelligent system for controlling inflation. This is an advanced method of oscillometric measurement and does not require pressure pre-setting or re-inflation. The M4 intelli can help to monitor hypertension as well as detect irregular heartbeats. The OMRON M4 intelli upper arm blood pressure monitor can be used by two separate users and will be able to store up to 60 unique times and dates readings for each user.