Small enough to fit in your purse and still boasting a big, easy-read screen, the Lenus Wrist fully-automatic digital blood pressure monitor has the largest screen size in its class. Big, high-contrast letters aid to the ease of reading. Easy to use at home or on the go. It has a WHO (World Health Organization) recommendation function that will assess your reading according to WHO standards. It can store up to 90 prior measurements so you can track your 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 conveniently attached to the monitor and is resistant to abrasion, chemicals (chlorine and peroxide), and moisture.