Fits Arm Circumference (22-32Cm) The device uses its advanced IntelliSense technology for comfortable controlled inflation without the need for pressure pre-setting or re-inflation even a slight pressure change can be detected resulting most accurate measurement. Along with blood pressure monitoring, this product detects irregular heartbeat. It is loaded with a body movement indicator and blinks if your systolic or diastolic pressure is outside the standard range (above 135 systolic/85 diastolic mmHg).