Digital Blood Pressure Monitor - Smart Logic technology inflates to the proper pressure for the ultimate in simplicity in measuring systolic and diastolic blood pressure and pulse, eliminating confusing systolic set switches. ADCUFF for home D-ring cuff with size guide marking system proper positioning. Automatic inflation and deflation simplifies measurement. Extra large LCD readout. Last reading memory. Auto power cut off conserves battery life. Ultra quit pump motor. Accurate to +/-3 mmHg. Requires 4 AA batteries (not included). Black cuff. 2 year limited warranty.