The Omron 3 Series Wrist Blood Pressure Monitor (BP629) is affordable and easy to operate. With a simple one-touch operation, the device provides automatic inflation. Simple and Portable Design - Discrete and convenient portable wrist unit allows users to monitor their blood pressure at home, work or anywhere. Advanced Averaging - Exclusive technology automatically displays the average of up to the last 3 readings taken within the last 10 minutes. 60 Memory Storage with Date and Time - 60 memory storage with date and time stamp allows you to review the last 60 readings with a touch of a button. Requires 2 "AAA" batteries (included).