It comes with everything you need such as keep track of your systolic and diastolic blood pressure and heart rate, helps you to understand your blood pressure level by the World Health Organization (WHO) blood pressure classification bar indicator and equipped with irregular heartbeat detection. This device is FDA 510(k) medical device class II cleared and listed, CE0123 compliances, technically equivalent to model MD2301 that passed BHS A/A, ESH and AAMI protocols which criteria are to ensure only the best devices are recommended for clinical use. Big LCD screen, oversized numbers, and White color backlight make it very easy-to-read, even in a dim environment. Just one touch to start measurement. Large memory size stores up to 480 records: 4 users with 120 records each. Adjustable upper arm cuff comfortably fits arm sizes from circumference 9″ to 14″. The kit includes a pouch for convenient storage. The monitor operates on four (4) AAA batteries and they are also included. It is our goal to provide you with a high-quality product that will meet and exceed your expectations. This product is covered by 5-Year Limited Warranty.