Rossmax CH155F Automatic Blood Pressure Monitor provides measurements equivalent to those obtained by a trained observer using cuff/stethoscope auscultation method, within the limits prescribed by the American National Standard, Electronic or Automated Sphygmomanometers. Rossmax CH155F Automatic Blood Pressure Monitor uses the oscillometric method to detect your blood pressure. The "Movement Detection" helps reminding the user to remain still and is indicating any body movement during measurement. The specified icon appears once a "body movement" has been detected during and after each measurement. This unit is equipped with innovative blood pressure risk indicator, which visually indicates the assumed risk level (normal/prehypertension/stage 1 hypertension/stage 2 hypertension) of the result after each measurement. This unit is equipped with an Irregular Heartbeat (IHB) Detection which allows those who have an irregular heartbeat to obtain accurate measurements alerting the user of the presence of an irregular heartbeat during the measurement. Real Fuzzy Technology determines ideal cuff pressure based on one's systolic blood pressure and arm size. Users no longer need to pre-set the inflation level before measurement. Rossmax CH155F blood pressure monitor has passed the criteria of the European Society of Hypertension by achieving all requirements. This monitor further meets the AAMI accuracy standard requirements (AAMI/ANSI/ISO 81060-2).