Product Dimensions: 7.56 x 6.84 x 3.1 (without armband) Storage Temperature: -20 ~ 50 Storage Humidity: 15% ~ 90% Operating Temperature: 10 ~ 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) times / min / Accuracy: 3 mmHg 0.4 kPa Voltage: 3V Delivery Content: 1 * piece Blood Pressure Monitor (without batteries) Dual mode, each of the 99 memory measurements 1. INSTANT MONITORING - This generation monitor with wide-screen clinical digital wrist blood pressure monitor is designed to make your blood pressure monitoring simple, fast, and easy at any time. It provides you with systolic and diastolic blood pressure readings along with heart rate. 2. CLINICAL ACCURACY - This digital blood pressure monitor features advanced measurement technology that provides you not only the fastest, but most importantly the most accurate reading method. It gives you 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 very important when medicating for high blood pressure. 3. HEART RHYTHM SENSOR AND HYPERTENSION INDICATOR - Recording your heart rhythm and the signs of high blood pressure is one of the best things to do with wide-screen clinical digital wrist blood pressure monitors. 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 very user-friendly and portable device because you can take it with you wherever you go at any time.