ADC Digital Advantage Auto Blood Pressure Monitor measures systolic, diastolic pressure, and pulse. British Hypertension Society (BHS) AA rating ensures unrivaled accuracy. Smart Logic Technology determines ideal inflation level. Irregular Heartbeat detector. Automatic inflation and deflation control. Recalls last 99 readings with date and time stamp for two users. Self-adjusting extended range latex-free D-Bar cuff fits arm ranges from 8.7" to 16.5" (22 cm to 42 cm). Auto-off. Four AA batteries included. Deluxe Storage case. Optional AC adapter (sold separately).