The BPL BP Monitor B21 i is a fully automatic digital blood pressure monitor used for accurately measuring and monitoring blood pressure and pulse at home. Its key features include a large, easy-to-read LCD with a warm white backlight, multiple user memory, and smart alerts for irregular heartbeat and incorrect cuff wrapping. It offers convenience through its dual power source (AA batteries or USB Type-C) and a universal, latex-free cuff that fits a range of arm circumferences.