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 itDual-user Mode: This bp monitor supports 2 users data storage, each user for 99 set of data memory with date \u0026 time stamp. Tack of your fitness and compare trends over a period of timeIrregular Heartbeat Detector: Updated irregular heartbeat detector detects and alerts you of irregular heartbeats during measurement and gives a warning signal on screen timelyTips: 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