Blood pressure is the force exerted on the walls of your blood vessels as blood flows through them. Your heart is like a pump. When it contracts, or beats, it sends a surge of blood through the blood vessels and pressure increases. This is called your systolic pressure. When your heart relaxes between beats, your blood pressure decreases. This is called your diastolic pressure. A few suggestion before measurement 1.Avoid eating, smoking, and exercising for at least 30 minutes before taking a measurement. Also rest for at least 15 minutes before taking a reading. 2.Stress raises blood pressure. Avoid taking measurementsduring stressful times. 3.You would better apply the cuff on your left upper arm. 4.Measurement should be taken in a quiet place and you should be relaxed, seated position. Rest your left amm on a table. 5.Remain still and do not talk during the measurement. 6.Keep a record of your blood pressure and pulse for your doctor. Remember, a single measurement does not providean accurate indication of your true blood pressure. You need to take and record several measurements over a period of time. Try to measure your blood pressure at the same time each day for consistency. Blood pressure measurements fluctuate considerably. 7.Wait 5-10 minutes between successive measurements. Waiting allows the engorged blood vessels to return to normal. You may require more rest time depending on your individual physical conditions. Note: 1.lf it is not possible to fit the cuff to the left arm, it can also be placed on the right arm.However all measurements should be made using the same arm for better cross reference. 2.When measuring, the legs should not be crossed, feet flat on the ground, arms and back vertical. 3.When measuring, do not squeeze the hose of cuff, as this may cause injury or incorrect measurements. Precaution before use 1.Do not confuse self-monitoring with self-diagnoses. Blood pressure measurements should only be interpreted by a health professional who is familiar with your medical history. 2.lf you are taking medication, consult with your physician to determine the most appropriate time to measure your blood pressure. Never change a prescribed medication without first consulting with your physician. 3.For persons with irregular or unstable peripheral circulation problems due to diabetes, liver disease, hardening of the arteries, etc., there may be fluctuation in blood pressure values measured at the upper arm versus at the wrist. 4.This device is designed for adults to use if use this device on a child patient, old people or toddlers, consult with your physician or measure with relative aid. 5.Measurements may be impaired if this device is use near televisions, microwave ovens, X-ray mobile phone equipment or other devices with strong electrical fields. To prevent such interference, use the meter at a sufficient distance from such devices or turn them off. 6.This device is not suitable for disease diagnoses, urgent treatment, continuous monitoring during medical emergencies or operations. 7.Before using, should wash your hand. 8.lf there is overmuch pressure or you feel uncomfortable, please press power button immediately for quick deflation. 9.Five minutes should elapse before the first reading is taken. 10.lf there are unexpected readings, you should seed an explanation from your physician. 11.Any reading may be affected by the measuring position, the patient's position, movement, or the patient's physical condition. 12.Failure to use the cuff specified by use manual, or modified instrument may result in incorrect measurements. 13.lf the device is stored in the lowest (-20°C) or highest temperature (55C) environment and measured at the ambient temperature (20°C), it shall be placed in the environment for 15 minutes before the measurement. 14.Too frequent blood pressure measurements can lead to unnecessary stress and elevated blood pressure. 15.Measuring blood pressure in a wound can lead to incorrect measurements and bacterial infections. 16.Cuff may trigger lymphedema in the upper extremity when used on the arm for a mastectomy. 17.Pressure on the cuff can temporarily disable monitoring devices that are used at the same time on the same limb. 18.lt is necessary to check whether the operation of the sphygmomanometer will have a long-term effect on the patient's blood circulation. 19.Continuous compression of the cuff by knotted hoses may result in incorrect measurements or damage to the patient's skin. 20.Contraindications: serious arteriosclerosis, cardiac pacemaker. 21.Patient is intended operator. 22.Pregnant women and preeclampsia patients can't use this device.