in Chinese o Extra-large LCD with digital display system.touch screen or button operation.60 times memo Display system ries with date and time display. Measuring method: Oscillometric method.automatic inflation.automatic measurement. Blood pressure measuring range: 40-220mmHg Pulse rate range: 40-180/min Measuring accuracy: Within 3mmHg (0.4kPa) Pulse rate accuracy: Within 5centipercent Machine size: 78mm*75mm*28mm Weight: Appro* 115g (excluding battery) Power source: 2*AAA size batteries Environmental temperature and humidity for using: 5C-40C 85CentpercentR.H Automatic read high .low blood pressure and heart rate value English ( model A&B)