Double 99 groups memory, IHB arrhythmia detection, WHO blood pressure classificationVoltage and battery detectionStorage temperature: -20 Celsius~50 CelsiusStorage humidity: 15%~90%Operating temperature: 10 Celsius~40 CelsiusOperating humidity: 40%~85%Display: LCD digital displayMeasurement method: pulse scanning method/oscillometric methodMeasuring range: hypertension/hypotension: 20mmHg~280mmHgPulse: (40~200) beats/minuteResolution: 1mmHg (0.1kPa)Accuracy: +/- 3mmHg ( +/- 0.4kPa)Pulse: within +/- 3% of readingVoltage: 5VPower consumption: 0.01WColour: whiteMaterial: plasticSize: 11.8x9.5x6.5cmPackage Contents:1 * Sphygmomanometer1 * WristbandOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.