Double Users and LCD display: 2 x 90 sets memory function, all measurements result, date, and time will be displayed in the liqud crystal LCD display, Easy to read,and automatically stored.HOW TO USE: The POSITION of where to wrap the item is very important, this will effect the ACCURACY of the reading. Please refer to the SECOND picture of how to use.Press the M button when power off, the latest 3 times average value will be shown, press the M button again to show the lasts memory, press the S button to show the oldest memory.Simultaneous readout of systolic/diastolic pressure, pulse rate and irregular heartbeat detection according to WHO and IHB index, which is accurate with pressure is less than 3mmHg and pulse is less than 5% of reading.Auto-Display and Auto power off when no operations for 1 minute with lower power consumption. Small size, easy to carry, suitable for health care (medical field, families, and adults), quality-assured, FDA approved.