Description	Automatic upper arm blood pressure monitor U81D
Display	LCD digital display
Measuring principle	Oscillometric method
Measuring localization	Upper arm
Measurement range	Pressure	0~299 mmHg
	Pulse	40~199 pulses/min
Accuracy	Pressure	±3mmHg
	Pulse	±5% of reading
LCD indication	Pressure	3 digits display of mmHg
	Pulse	3 digits display
	Symbol	Memory/Heartbeat/Low battery
Memory function	2x90 sets memory of measurement values
Power source	4pcs AAA alkaline battery / type-c 5 V
Automatic power off	In 3 minutes
Main unit weight	Approx.230g (batteries not included)
Main unit size	LX W X H=124X 95X 52mm（4.88X 3.74X 2.05 inch）
Main unit lifetime	10,000 times under normal use
Battery life	Could be used for 300 times for normal condition
Accessories	Cuff, instruction manual
Operating environment	Temperature	5~40°C
	Humidity	15% ~ 93%RH
	Air pressure	86kPa ~ 106kPa
Storage environment	Air pressure 86kPa ~ 106kPa Temperature -20°C - 55°C, Humidity: 10% ~ 93% avoid crash, sun burn or rain during transportation.
Expected service life	5 years

For accurate measurements, please do as the following steps: 1.Relax about 5-10 minutes before measuring. Avoid eating, drinking alcohol, smoking, and bathing for 30 minutes before taking measurements. 2.Roll up your sleeve but not too tight, remove watch or other ornaments from the measured arm; 3.Put the upper arm blood pressure monitor on your left wrist,and the led screen up towards the face. 4.Please sit on a chair and take an erect body posture, make sure the blood pressure monitor is on the same level with heart. Don't bend over or cross your legs or talking during the measurement, until measurement is complete; 5.Read the measuring data and check your blood pressure by referring the WHO classification indicator .   NOTE: Arm circumference should be measured with measuring tape in the middle of the relaxed upper arm. Do not force cuff connection into the opening. Make sure the cuff connection is not pushed into the AC adapter port.   How to set the users? Press S button when power off, the screen will display user 1/user 2, press M button to switch from user1 to user2 or user2 to user1, then press S button to confirm the user. How to set the year/month/ date time? Continue to above step, it will enter into year setting and the screen will flash 20xx. Press M button to adjust the number from 2001 to 2099, then press S button to confirm and enter into the next setting. The other settings are operated like year setting. How to read memory records? Please press the M button when power off, the latest 3 times average value will be shown. Press M again to show the latest memory, press S button to show the oldest memory, as well as subsequent measurements can be shown one after the other by pressing the M button and S button each time.