Electronic blood pressure monitor for the upper arm, very suitable for home use. Suitable for all types of people, easy to use and easy to use. Thanks to it, you can measure your blood pressure at any time at home. Material: ABS+PCMeasuring range: blood pressure 0~280 mmHg (0~37.3 kpa), heart rate 40~195 beats/min Measurement accuracy: blood pressure value 0.4 kpa ( 3 mmHg), heart rate reading value 5%, manual shutdown or automatic shutdown after 60s without operation.Working environment: Operating temperature : 10~40 Operating humidity: 40% ~ 85% Storage environment: Storage temperature: -20~50 Storage humidity: 15%~90% 1) LCD digital liquid crystal display, the result shows high voltage/low voltage/pulse, large screen and large characters, clear reading. 2) The WHO blood pressure monitor classifies health problems related to blood pressure to allow users to accurately determine whether blood pressure is normal. 3) Fully automatic intelligent compression and decompression, IHB arrhythmia detection 4) Year, month, day, hour and minute settings 5) 99 groups measurement results memory for two people, which can display the average reading of the last three measurement results to make it easier for users to retrieve data for comparison. 6) Manual shutdown or automatic shutdown after 1 minute of inactivity, simple and convenient operation 7) Conversion of blood pressure value units between Kpa and mmHg display units (the default unit at startup is mmHg) 8) Overpressure protection function, if the air pressure exceeds 295mmHg-20ms, it will automatically and quickly vent, safely and reliably. 9) Error prompt function for users to find the cause of errors 10) Low power detection function, detects low power in any working state, LCD shows low power 11 ) Measurable arm circumference: approx. 22 ~ 32 cm. 12) LCD Screen Size: 41*61mm 4*1.5V (4 AAA alkaline batteries, the product does not contain batteries)Note: The data are all measured manually, please allow error of 1-3cm, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.