99 sets of storage( 2 people),IHB arrhythmia detection, WHO blood pressure classification.Intelligent pressurize live voice (optional),volume control (optional) Voltage power detection,Low power consumption large LCD screen Display:Digital liquid crystal display Fashionable outward,Light and compact,suitable for health care(medical field,families and adult) Auto power off SPECIFICATIONS Type:Blood Pressure Monitor Display:Digital liquid crystal display Working voltage: 6V Shut off the current: