Product Dimensions: 7.56 x 6.84 x 3.1 (without wristband) Weight: 280 g Storage Temperature: -20 ~ 50 ℃ Storage Humidity: 15% ~ 90% Operating Temperature: 10 ~ 40 ℃ Operating Humidity: 40% ~ 85% Display: LCD digital display Measurement Method: Pulse sampling / Oscilloscope assay Measurement Range: Hypertension / Hypotension: 20 mmHg ~ 280 mmHg Pulse: (40 to 200) times / min / Accuracy: 3 mmHg 0.4 kPa / Pulse: 3 percent of the measured value within Voltage: 3V Power: 2 * AAA alkaline cells (not included) Package Includes: 1 * piece blood pressure monitor (Without batteries) Description: * Accurate and Reliable: Pressure accuracy is 3 mmHg and pulse measurement accuracy is 5%. Easily and accurately monitor the health of you and your family. It has advanced measurement technology to provide you with the most accurate readings. * Easy to Read: The blood pressure monitor has a three-color, backlit screen so you can read clearly even at night. Just press one button to use, which is very easy for the elderly. * Effective Health Monitoring: You can quickly measure blood pressure and pulse and detect and monitor abnormal heart rhythms, preventing serious damage to organs and blood vessels.