Easy Wrap arm cuff expands to fit regular and large arms. Indicator confirms the cuff has been wrapped correctly on arm. Automatically displays the average of up to the last three readings taken within the last 10 minutes. Alerts user if an irregular heartbeat is detected or blood pressure exceeds internationally recognized guidelines. 120-memory storage with date and time stamp. Fits arms 9″ – 10″ in circumference. Includes four AA batteries.