The Wrist-Type Blood Pressure Monitoring Unit is simple to use and easy to maintain. It is compact and portable, making it ideal for home or travel use. It operates using 2 AAA batteries and has an automatic power-off feature that saves battery life. There is an easy-to-read LCD digital display that shows systolic (top number), diastolic (bottom number), and pulse rate. The unit's memory holds up to 120 results.