Your source for a lifetime of health.Blood Pressure MonitorA & D Medical1. Slide on cuff and secure comfortably. 2. Press START button. Squeeze bulb to inflate cuff. 3. Blood pressure is measured as cuff automatically deflates. Results will be displayed on the screen. Choose the right cuff. Using the correct size cuff is important for an accurate reading. Measure the circumference of your upper arm at the midpoint between the shoulder and elbow. Select the proper cuff size from the chart below: Medium - arm size 9.4 in - 14.2 in (24 - 36 cm). Large - arm size 14.2 in - 17.7 in (36 - 45 cm). This monitor is not compatible with LifeSource small cuffs. This box contains a medium cuff.Uses:30 memory recall function. Irregular heartbeat feature. Calculates and displays average readings. Monitor Features: Pressure Rating Indicator - Visually indicates user's blood pressure category from measurements taken (see details inside). Irregular Heartbeat Feature - Alerts user of presence of an irregular heartbeat and provides blood pressure and pulse rate measurements even if an irregular heartbeat occurs. Displays Average Readings - Calculates the average of the total readings stored in memory; a convenient way to get a snapshot of your measurements. This box contains: Monitor with 30 memory recall, medium cuff, Trilingual Instruction Manual - English, French, Spanish; latex-free bulb, Quick Start Card, blood pressure logbook, one AA battery.