The monitor is fully automatic, small in size, lightweight and easy to use. One button operation turns the monitor on and off. When activated the cuff automatically inflates. When the cycle is completed, systolic pressure, diastolic pressure and pulse rate are displayed. Choose mute, English, or Spanish voice readout. Comes with a portable carrying case the easily fits into a suitcase, travel bag, or purse. Measured accuracy within ± 5mmHg. Two AAA batteries are included.