Product Dimensions: 7.56 x 6.84 x 3.1 inches (without wristband) Storage Temperature: -20°C ~ 50°C Storage Humidity: 15% ~ 90% Operating Temperature: 10°C ~ 40°C Operating Humidity: 40% ~ 85% Display: LCD Digital Display Measurement Method: Pulse Scanning / Oscillometric Analysis Measurement Range: Hypertension/Hypotension: 20 mmHg ~ 280 mmHg Pulse: (40 to 200) beats/min Accuracy: ±3 mmHg ±0.4 kPa Voltage: 3V Delivery Contents: 1 * Blood Pressure Monitor (batteries not included) Dual Mode, with 99 memory measurements for each mode. 1. INSTANT MONITORING - This generation monitor with a widescreen clinical digital wrist blood pressure cuff is designed to make your blood pressure monitoring simple, fast, and easy anytime. It provides systolic and diastolic blood pressure readings along with your heart rate. 2. CLINICAL ACCURACY - This digital blood pressure monitor features advanced measurement technology that delivers not only the fastest but, most importantly, the most accurate reading method. It provides you with only the most reliable reading of whether you have higher or lower blood pressure than normal. This is of great importance as the accuracy of readings is crucial when taking high blood pressure medication. 3. HEARTBEAT DETECTOR AND HYPERTENSION INDICATOR - Recording your heartbeat and signs of high blood pressure is one of the best things to do with widescreen clinical digital wrist blood pressure cuffs. Its hypertension indicator shows if the reading exceeds the internationally recognized guidelines for normal blood pressure values at home. 4. RECALL OF LATEST MEMORY - The memory recall function allows you to record the previous reading if you forget to do so. This also helps you distinguish the number of times your blood pressure fluctuated from normal to unusual or alarming levels throughout the day. 5. You will definitely love this highly user-friendly and portable device as you can take it with you wherever you go at any time.