The Omron HEM 7121J is a compact, fully automatic bp monitor, operating on the oscillometric principle for precise measurements and accurate results. It measures your bp with easy one touch operation The device uses its advanced “intellisense” technology for comfortable controlled inflation, even a slight pressure change can be detected, resulting most accurate measurement, Saves time & money. Quick deflation releases valve for speedy measurement Along with bp monitoring this product detects irregular heartbeat. Its loaded with body movement indicator and cuff wrapping guide which helps you keep even better watch on your cardiovascular health