Digital monitors measure blood pressure oscillometrically rather than by auscultation. In auscultation, stethoscopes are used to take blood pressure by listening for specific heartbeat sounds which the doctor then uses to determine systolic & diastolic pressures. Oscillometric technology measures the vibration of blood traveling through the arteries & converts the movement into digital readings.
Omron digital blood pressure monitors use the oscillometric method of blood pressure measurement. An oscillometric monitor does not need a stethoscope so the monitor is simple to use.
It is also important to note that home blood pressure monitoring allows you to monitor frequently & share the results with your doctor if you desire.