Our wrist blood pressure monitor is backlit, so you can see the numbers on the screen even in dark environment, which is very convenient for the elderly.We have improved the wrist blood pressure monitornd it is now rechargeable, eliminating the need to buy batteries.To check your blood pressure statustny time, we highly recommend our wrist blood pressure cuff. Small size, light weight, easy to use, low noise, suitable for family self-test or travel measurement.HOW DOES IT WORK:For moreccuracy, please follow the steps below to use the wrist blood pressure monitor:1.Before measurement, please relax forbout 5-10 minutesndvoid eating, drinkinglcohol, smokingnd bathing within 30 minutes;2.Roll up your sleevend make sure it's not too tight, remove your watch or other wrist decorations;3.Wrap your wrist inside the sleeve, make sure the screen is facing upnd toward your face;4.Please sit on chairnd haven upright body posture, keep the devicet the same levels your heart,nd then start measuring. Please do not crouch or cross your legs or speak until it is complete;5.Read the measured readingsnd check your BP by referring to the rating indicator;PERFORMING READING:Press the "Power" button.Press the "Start" button.Usenverage of 2 readings.Wait couple of minutes between readings.Wait 5 minutes to take more readings if your blood pressure seems high.WHAT VALUESRE NORMAL?DIA =110 or SYS >= 180 Severe hypertension