Wrist type blood pressure monitor, battery powered(batteries not included), Large display screen(NO backlight) Voice Broadcast: The bp monitor will tell you the result after measurements. Suitable for the seniors and people with poor vision. The voice function can be turned off if you don't need it(English broadcast) Dual-user Mode: This bp monitor supports 2 users data storage, each user for 99 set of data memory with date & time stamp. Tack of your fitness and compare trends over a period of time Irregular Heartbeat Detector: Updated irregular heartbeat detector detects and alerts you of irregular heartbeats during measurement and gives a warning signal on screen timely Tips: keep the monitor as the same height as the heart when measurement, relax and don't move. Don't drink alcohol or coffee, eating, smoking, exercising and bathing in 30 minutes before measuring Accurate readings by the average value of the latest three records Quick measurement for a more comfortable experience that's less than 45 seconds Voice broadcast in the whole process makes poor vision elder could easy to use Time and date are convenient to keep track of your health status and analyze trends over a period of time Irregular heartbeat detector Dual-user Mode, 99X2 Reading Memory Which values are normal? DIA < 80 & SYS < 120 optimal blood pressure DIA < 85 & SYS < 130 Normal blood pressure DIA < 90 & SYS < 140 High normal value DIA < 100 & SYS < 160 Mild hypertension DIA < 110 & SYS < 180 Moderate hypertension DIA >=110 or SYS >= 180 Severe hypertension