Bilingual voice guide prompts use and announces readings aloud. WHO indicator provides an instant comparison to the World Health Organization standards. Features irregular heartbeat indicator, 120-reading memory with 2 memory banks (60 readings each), automatic one button operation, large LCD display with date and time stamp and automatic shut off. Displays systolic, diastolic and pulse readings simultaneously. Includes case, guidebook in English and Spanish, Quick Start Guide, batteries (4AA for the arm monitor and 2 AAA for the wrist monitor) and AC adaptor for arm unit. Arm monitor fits adult arms 11.75-16.5. Wrist monitor fits adult wrists 5 3/8- 7 3/8. Lifetime limited warranty.