Features: 1) Small delicate design 2) LCD digital display 3) It can store 99 groups of measuring results of two people and display the average reading of measurement results of the latest three times 4) Automatic compression and decompression 5) Blood pressure classification function provides convenience for users to judge whether their blood pressure value is normal or not 6) The product will automatically go into sleep mode in 1 minute after measurement 7 )Working Voltage: 3V ( AAA * 2 ) 8) Adult wristband : For wrist circumference range 13.5cm-19.5cm Function Description: 1)Result display: SBP/DBP/PR 2)Unit switch: Kpa/mmHg switch (default unit is mmHg) 3)Sets of memory: Double sets of memory ,each set has 99 groups memory recall 4) Clock function: set the year ,month,date , hour and minute. 5)Low power inspection: LCD will display such a signal to indicate low power , please check the low power in any state work . 6) Protective function for excessive pressure: If the air pressure is over 295mmHg (20ms) , the product will exhaust quickly and automatically. 7)Power-off function: automatically power-off if there is no operation within 1 minute. Note: There is no voice broadcast function! Package Include : – Blood pressure monitor (with wristband) – Instructions – Retail Box By aviation restrictions, the batteries are not included in the package. Function Keys Display: 1.Low Power Signal 2. Systolic Pressure 3.Diastolic Pressure 4.Pulse Rate 5.HR Symbol 6.Sets of Memory 7.Blood Pressure Unit Symbol 8.Average Symbol 9.Blood Pressure Classification Symbol 10. Systolic Pressure 11.Date/Time Display Correct Measurement Methods : 1)Sit in a chair as shown in the picture , don’t lean forward or bend your body . 2)Before measurement ,take a deep breath three or four times ,recover to the mormal breath , relax your shoulders and arms .Make sure your body relaxed . 3)During measurement , the middle of the wrist cuff should be the same height with the heart ,The body and your wrist can not move , We recommend that you put a soft cushion under the elbow .