Thigh 15.9 - 25.7 * The diaphragm gears springs and linkages - the very components that make an aneroid vulnerable to shock vibration and over-inflation were removed - and replaced with electronic pressure sensors IC chips and a backlit extra large easy to read liquid crystal digital display * Shock resistant * Easy to read in daylight as it is in a dark room * Displays deflation rate to promote more accurate measurements * It is so efficient it gets up to 1500 cycles on two AAA batteries * It provides two battery strength warnings - advance and urgent to ensure you never lose power at an inopportune time * It will work with virtually every major brand of blood pressure cuff on the market * It has a systolic assist that will alert you about 20mmHg before the onset of Korotkoff sounds * A pulse monitor that will display pulse rate once measurement is complete * It will remind you to check calibration once per year or every 10 000 cycles whichever comes first * This instrument will turn itself off to conserve battery strength * Used with stethoscope (not included) * Lifetime calibration warranty *