This blood pressure monitor is an automatically inflating and deflating wrist blood pressure and pulse monitoring system. One user can store up to 90 memory readings, and averages are giving for the latest three readings. Size range 5" to 8". This monitor records blood pressure in seconds and provides easy to read WHO blood pressure classification indication. This monitor also displays the time and date, comes with a storage case with batteries, and comes with a 2 year limited warranty. 2 AAA batteries are required to operate (included).