Unique See-Thru screen and large digits for an easy to read results. Irregular heartbeat detector & personalized heartbeat level alert warning Clinically validated by BHS & GHS. Good Housekeeping Seal of Approval Memory averaging will automatically average of last 3 readings and holds up to 180 readings to track results Includes Deluxe Thinline blood pressure monitor, universal cuff to fit arm 9"-17", AA batteries, AC adapter, Quick Reference guide and English/Spanish instruction manual