Product Product Dimensions: 7.56 x 6.84 x 3.1 (without cuff) Storage Temperature: -20 ~ 50 ℃ Storage Humidity: 15% ~ 90% Operating Temperature: 10 ~ 40 ℃. 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 * Blood Pressure Monitor (without batteries) Dual mode, each with 99 memory measurements 1. INSTANT MONITORING - This generation meter with widescreen clinical digital wrist blood pressure cuffs is designed to make your blood pressure monitoring easy, fast, and light anytime. It provides you with systolic and diastolic blood pressure values 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 measurement 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 with high blood pressure medication. 3. HEART RATE DETECTOR AND HYPERTENSION INDICATOR - Recording your heart rate 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 LATEST MEMORY - The memory recall function allows you to record the previous reading if you forget to do so. This also helps you differentiate 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 as you can take it with you anywhere anytime.