Cuff fits wrist size: 5.3" – 8.4" (13.5 – 21.5 cm) Clinically accurate readings Fully automatic inflation and deflation Adjustable language volume control 4-person memory bank holds 396-readings, 99 per user Average of last 3 readings Hypertension Indicator Irregular Heartbeat Detection Includes: Monitor with attached adult wrist cuff, storage case, two AAA batteries, detailed English/Spanish/French guidebook, quick start guide, FAQ pamphlet and blood pressure charting log .