Graphic back lit LCD that mimics the appearance of a mercury column for easier reading. Multi-function alpha-numeric LCD displays air pressure, deflation rate, systolic and diastolic pressure and pulse (auot mode only). Manual measurement mode allows practitioners to use the timetested auscultatory method to obtain readings with ANY sized cuff. Automatic inflation to preset levels simplifies use. ECV (electronic control valve) precisely controls deflation at one of three pre-established rates for optimum results. Auto mode obtains readings automatically in about 1 minute. Can be used with child, adult and most large adult cuffs. Automatic inflation and deflation of the cuff. In manual mode, the perator can select from deflation rates of 2.5, 4.5 or 6.5mmHg/sec. NICAD rechargeable battery provides about 200 measurments use in a single charge. AC adapter. Intuitive mercury free luminescent LCD colmn display is easy to read. Secondary numeric LCD display with extra large digits. Dual measurement mode for unrivaled versatility. Safe, no mercury. Clinically proven accuracy.