Product Dimensions: 7.56 x 6.84 x 3.1 inches (without wristband) 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) beats/min Accuracy: ±3 mmHg ±0.4 kPa Voltage: 3V Delivery Contents: 1 * Blood Pressure Monitor (without batteries) Dual Mode, each with 99 memory measurements 1. INSTANT MONITORING - This generation of wide-screen clinical digital wrist blood pressure cuffs is designed for easy, fast, and effortless blood pressure monitoring anytime. It provides systolic and diastolic blood pressure readings along with heart rate. 2. CLINICAL ACCURACY - Featuring advanced measurement technology, this digital blood pressure monitor delivers the fastest and most accurate readings. It ensures reliable results for detecting high or low blood pressure, crucial for managing hypertension medication. 3. HEART RATE DETECTOR & HYPERTENSION INDICATOR - Track your heart rate and detect signs of high blood pressure with this wide-screen clinical digital wrist blood pressure cuff. Its hypertension indicator alerts you if readings exceed internationally recognized normal blood pressure guidelines. 4. RECALL LAST MEMORY - The memory recall function allows you to review previous readings if you forget to record them, helping you track fluctuations in your blood pressure throughout the day. 5. User-Friendly & Portable: This highly user-friendly and portable device is perfect for monitoring your health on the go, anytime and anywhere.