OMRON AUTOMATIC BLOOD PRESSURE MONITOR M2 ,Fully Automatic Upper Arm Blood Pressure Monitor Gives You Comfortable, Quick And Accurate Blood Pressure Monitoring. Intellisense Technology Ensures That The Arm Cuff Reaches The Correct Inflation And Doesn't Pump Up Too High.the Clinically Validated M2 Basic Also Features A Hypertension Indicator That Displays A Symbol On Screen If A Reading Is Higher Than The Recommended Blood Pressure Level Of 135/85 Mmhg.when Using An Omron Blood Pressure Monitor, Please Ensure That The Cuff Size Is Correct. The Omron M2 Basic Comes With A Standard Size Cuff For Arm Circumference 22 Cm To 32 Cm. An Optional Omron Large Blood Pressure Monitor Cuff, Suitable For Arm Circumference 32 Cm To 42 Cm,