Works With All Omron Automatic And Manual Inflate Blood Pressure Monitors (Excludes Hem-773Ac). Please Note This Cuff Does Not Work With The Following Units: Hem-780, Hem-785 And Hem-791Itc. This Extra-Large Blood Pressure Cuff fits arms 13" to 17" in circumference. It helps to monitor your blood pressure and ensure that it is in a safe range. The large blood pressure monitor provides an automatic reading. It is easy to use. Taking your blood pressure is easy with the lightweight and convenient HEM-432 blood pressure monitor. Simply wrap the cuff around your arm and squeeze the bulb to begin inflation. In seconds, your blood pressure and pulse readings are displayed on the large digital panel.