The Lenus fully-automatic digital blood pressure monitor has the largest screen size in its class. The super-large screen has big, high-contrast letters for easy reading, making it a useful option for visually-impaired users. It's designed for demanding professional situations but is easy to use at home. It has a WHO (World Health Organization) recommendation function that will assess your reading according to WHO standards. It can store up to 120 prior measurements in 2 zones so the user can track blood pressure readings over time. The Lenus? Arm features one-touch fully-automatic operation. Battery meter indicates remaining battery life. It comes with an adult Velcro® cuff that is resistant to abrasion, chemicals (chlorine and peroxide), and moisture.