Electronic digital blood pressure monitor with voice function. Large LCD size: 80 x 72mm; LCD and start/stop button backlight; 2x90 groups memory function; average calculating for the latest 3 times measurement value; blood pressure classification (WHO) indicator; irregular heartbeat (IHB) indicator; year/month/date/time function; accuracy: pressure +/-3mmHg; pulse +/-5%; power by DC 6V (1.5V 4pcs AAA size batteries) not included; automatic power-off function. Power source: electricity. Power supply mode: removable battery. Material: plastic. Measuring method: the oscillometric method. Display: LCD display. Auto power-off: 60 secs no operation. Cuff size: 22 cm ~ 32 cm. Pressure range: 20 to 299 mmHg.