1. Measures the person's blood pressure in advance and then calculates the amount that needs to be pressed. 2. The lower the blood pressure, the less pressure is applied. Protects the wristband and the machine and is reliable in use. 3. WHO blood pressure warning field. When the measurement is completed, there is a short black line on the left side of the screen, corresponding to the WHO's three-color warning field on the body. 4. High blood pressure in red color, warning in yellow color, and normal in green color. 90 Groups of memory results. 5. Stable performance and with temperature sensor. The pressure sensor will produce a large error at high or low temperatures. The temperature sensor measures the actual temperature, compares it with the best use temperature for the blood pressure monitor, and compensates for the measurement results. Item Type: Blood Pressure Monitor Material: Plastic Wristband: Approx. 135 ~ 195 mm / 5.3 ~ 7.7 in Measurement Range: Pressure: 20 ~ 280 mmHg Pulse Rate: 40 ~ 165 beats/min Accuracy: Pressure: Within ±3 mmHg Pulse Rate: Within ±5% of reading Application: Wrist Size: Approx. 70 x 72.6 x 32.5 mm / 2.8 x 2.9 x 1.3 in (L x W x H) Battery Model: 2 x AA batteries (not included) Display: LCD Instructions: Wrist model, easy to use by pressing the button Measures blood pressure and pulse quickly and accurately Ideal for daily blood pressure monitoring Automatically determines the ideal cuff inflation state Average of the last three readings Can choose between mmHg and kPa Signs of irregular heartbeat High/low pulse rate indicator Large and clear LCD display, easy to read Guiding criteria for assessing high blood pressure