Feature:Large LCD digital display2x90 groups memory functionAverage calculating for the latest 3 times measurement valueBlood pressure classification (WHO) indicatorIrregular heartbeat (IHB) indicatorYear/month/date/time functionAutomatic power-off in 3 minutesMedical CE approval， RoHs， REACH， PAHs， Phthalates compliance Specific:Automatic Wrist Blood Pressure MonitorDisplay:LCD digital displayMeasuring principle:Oscillometric methodMeasuring localization:WristMeasurement range:Pressure 0~299mmHg ( 0~39.9kPa)，Pulse 40~199 pulses/minAccuracy:Pressure ¡À3mmHg (¡À0.4kPa)， Pulse ¡À5% of readingLCD indication:Pressure 3 digits display of mmHg， Pulse 3 digits displaySymbol:Memory/Heartbeat/Low batteryMemory function:2x90 sets memory of measurement valuesPower source:2pcs AAA Alkaline battery DC.3V(NOT include)Automatic power off:In 3 minutesMain unit weight:122g(Approx.)Main unit size:73mm x 65mm x 65mmMain unit lifetime:10，000 times under normal useTemperature:5~40¡ãCHumidity:15%~85%RHAir pressure:86kPa~106kPaStorage environment:Temperature -20¡ãC~55¡ãC ，Humidity :10% ~85% avoid crash， sun burn or rain during transportation Packing Include:1 x Digital Wrist Blood Pressure Monitor & Heart Beat Meter1 x Manual