Accurate Pressure Reading, Your Health GuardianAccurate pressure readings are a promise for your health. Each GUAEVER upper arm blood pressure monitor is calibrated individually. It uses advanced chips and technology to ensure reliable results every time. While measuring your blood pressure, it also checks your heart rate and alerts you if it detects any irregular heartbeats. Quick Reading, Easy to UseCaring for health is simple with GUAEVER bp monitors for home use. The upper arm blood pressure machine has one-button measurement, automatic inflation, auto shut-off after 60 seconds, and voice guidance for the entire process. It takes only 40 seconds, so you can use it easily by yourself! You can turn off the voice if you don't need it, saving time and hassle. Three-Color Backlight, Easy to UnderstandThe three-color backlight home blood pressure monitors shows your blood pressure status instantly. It follows the 1999 WHO Hypertension Guidelines. Green means normal blood