A typical digital BP instrument measures systolic and diastolic pressure and pulse rate using the oscillometric method, with ranges often from 0-299 mmHg for pressure and 40-199 pulses/min for pulse, and an accuracy of ±3 mmHg for pressure and ±5% for pulse. Key features include an LCD display, memory storage (e.g., 2x90 sets), multiple user support, irregular heartbeat detection, an automatic power-off function, and power options like batteries or USB. Most models are automatic, requiring no manual pumping to inflate the cuff, and are designed for upper arm use.