Legible LCD digital display, 3-color backlight indicator and intelligent voice function are convenient for elderly people use Easy to use, fully automatic, assume proper sitting position, wrap the cuff around your upper arm, just click the button can get your Systolic/Diastolic blood pressure and pulse result Two users have their own independent measurement records, each user can record up to 99 measurements The BP cuff fits standard and large adult arms providing the most accurate and comfortable during the measurement process Auto-off after no operation in 1 minute When the air pressure exceeds 295mmHg-20ms, it will automatically and quickly exhaust for safe and reliable use Two power supply methods that can be powered by 4*AAA battery/USB cable(Not included)