This device is the Microlife BP B3 AFIB, an electronic device for measuring blood pressure from the upper arm. Atrial Fibrillation Detection: AFIBsens technology for detecting atrial fibrillation (a stroke risk factor) during blood pressure measurement. MAM Technology: Automatically performs 3 consecutive measurements and gives an accurate average for more reliable results. Large Memory: It can store up to 99 blood pressure readings. Ease of Use: Large LCD screen, and a "traffic light" indicator for easy classification of blood pressure results. Available as a single unit.