British Hypertension Society listed, CE marked, 5 star reviews & 12 months warranty Suresign Automatic Blood Pressure & Pulse Monitor uses the upper arm to measure your blood pressure and pulse whilst inflating, to give a scientifically accurate reading. It has 90 readings memory storage which works out your average blood pressure level, so you can gage how healthy you really are. Our Suresign Blood Pressure Monitor is intended for the measurement of Systolic & Diastolic arterial blood pressure. The device measures the fluctuations in the pressure of the cuff produced by extension & contraction of the artery in the arm in response to each heartbeat. These are converted into millimetres of mercury (Hg) & are displayed as a digital value. Easy to use & store. Automatic inflation & deflation. 90 memory storage. Pulse rate measurement. Includes standard cuff fits upper arm circumference 22cm-32cm.