A blood pressure monitor, also known as a blood pressure meter, sphygmomanometer , or blood pressure gauge, is a device used to measure blood pressure, composed of an inflatable cuff to collapse and then release the artery under the cuff in a controlled manner, and a mercury or mechanical manometer to measure the pressure. It is always used in conjunction with a means to determine at what pressure blood flow is just starting, and at what pressure it is unimpeded.Function:Irregular Heartbeat Detection, WHO Classification Indicator, Last 3 Test Average, Low Battery Detection, Low Battery Detection, Automatic Power-Off,  1×120 Memory with Date Time