Automatic Digital Blood Pressure Monitor ? Measuring Range: Pressure 30-250mmHg Pulse: 40-200/minute ? Measuring Accuracy: Pressure: 3mmHg Pulse: +5% ? Memory: 199sets ? Memorized readings average calculation ? Date/Time Display ? Inflation: Automatic by Electric Pump ? Deflation: Automatic by Valve ? Pressure Detection: Semi-conductor Pressure Sensor ? Power Source: AAAｘ2 Alkaline Battery ? Battery Life: Approximately 400 times of measurements ? Battery Management: 1-min, power-off/Low battery indicator