Panasonic EW3109W Portable Automatic Arm Blood Pressure Monitor The Panasonic Portable Automatic Arm Blood Pressure Monitor utilizes Digital Filter Technology that uses a sensor to detect and isolate only the essential pulse oscillation. It helps eliminate other noise factors, leading to quick and reliable measurement capability. This also helps avoid overtightening of the cuff on the wrist. Readings above 139 on Systolic or 89 Diastolic will automatically flash on the LCD screen. An automatic memory feature allows you to capture 90 readings and save them to track the readings over time. With just the touch of one button, the monitor auto inflates for quick, easy measurements.