The UB-533 Automatic Wrist Monitor benefits from many of the features developed by A&D for professional clinical use including the ability to screen for AFib (Atrial Fibrillation) in a single measurement. Please refer to the clinical paper: Diagnostic accuracy of a new algorithm to detect atrial fibrillation in a home blood pressure monitor for further informationSimple to use, easy one button operationLightweight, compact designCorrect Position Guidance technologyMovement Error Indicator to ensure accurate readingsCuff Error Indicator to ensure accurate readings2 x 60 readings memory recording for recording trendingDual user modeAverage reading functionExtra-large, easy to read LCD displayFast measurementClock and CalendarCarry caseBattery 2x AAA (included)