The Finger Blood Pressure Monitor is an electronic sphygmomanometer and pulse meter designed for use by individuals who frequently monitor their own blood pressure. This compact, portable unit takes systolic, diastolic, and pulse measurements from the left index finger and displays results on a liquid crystal display (LCD) panel. An adjustable cuff inflates and deflates automatically. POWER: Uses 2 double-A batteries (included). DIMENSIONS: The cuff fits left index fingers 2 to 3 inches in circumference. WEIGHT: 8 ounces. WARRANTY: 2-year manufacturer defect warranty.