Features 99sets of storage( 2 people),IHB arrhythmia detection, WHO blood pressure classification.Intelligense pressurize LCD screen(optional) Voltage power detection,Low power consumption Fashionable outward,Light and compact,suitable for health care(medical field,familes and adult) Auto power off:Auto power off when no operation for 1 minute Display:Digital liquid crystal display Accuracy: static:3mmHg(0.4kPa) Pule: within 5% Measurement mode: Oscillometric method Measurement range: Pressure: 0kPa-37.3kPa (0mmHg-280mmHg) Pulse: 40-199 times/min wrist band display range: 0kPa-39.9kPa (0mmHg-299mmHg) Resolution: 0.1kPa (1mmHg) Power supply: DC 6V (1.5V four AAA batteries) Storage temperature and moisture: Temperature (-10C-55C Moisture:10%-85%RH) Using temperature and moisture: Temperature (5C-40C Moisture:15%-85%RH) weight:each one is about 220 grams Dimention:12610053mm(not include Wristbands)