LED Mercury Free Sphygmomanometer is an exceptional new generation mercury-free blood pressure device used by maximum medical professionals. The display of this device is furnished with LED bar graph, best for the visibility and pollution. This device is largely used by hospitals, medical institutions, clinics, etc. Oscillometric measuring can be done through a button which you can find beside the LED screen. It is a digital blood pressure machine used to evaluate the high and low blood pressure of people. When the reading in LCD bar reaches to about 160-180mm, stop the puff and in around 10 seconds the readings will be displayed on screen. It is obviously better than Stethoscope method.