Product Product dimensions: 7.56 x 6.84 x 3.1 (without bracelet)Storage temperature: -20 - 50Storage humidity: 15 percent - 90 percent Operating temperature: 10 - 40 C.Operating humidity: 40 percent - 85 percent Display: LCD digital displayMeasurement method: pulse scan or oscilloscope assayMeasurement range: hypertension or hypotension: 20 mmHg - 280 mmHgPulse: (40 to 200) times or min or accuracy: 3 mmHg 0.4 kPaVoltage: 3VDelivery content1 x piece of blood pressure monitor (without batteries)Dual mode, each of the 99 memory measurements1. IMMEDIATE MONITORING - This generational monitor with widescreen clinical digital wrist blood pressure monitor cuffs is designed to make your blood pressure monitoring easy, quick and easy anytime. It gives you the systolic and diastolic blood pressure readings along with the heart rate.2. CLINICAL ACCURACY - This digital blood pressure monitor has advanced measurement technology that gives you not only the fastest, but most importantly the most accurate reading method. It only gives you the most reliable reading of whether or not you have higher or lower blood pressure than normal. This is of great importance because the accuracy of the readings is very important with high blood pressure medication.3. HEARTBEAT DETECTOR AND HYPERTENSION INDICATOR - Recording your heartbeat and the signs of high blood pressure is one of the best things to do with widescreen clinical digital wrist blood pressure monitor cuffs. Its hypertension indicator shows whether the reading exceeds the internationally recognized guidelines for normal blood pressure values at home.4. RECALL LAST MEMORY - The memory recall function allows you to record the previous reading in case you forget to do so. This will also help you differentiate the number of times your blood pressure fluctuated from normal to unusual or alarming levels during the day.5.You will definitely love this very user-friendly and portable device as you can take it with you anywhere anytime.