This device is designed for many types of measurements and graph displays. Some of its major features include pulse rate and waveform displays, a bar graph display, PI display, pulse rate sound indication, SpO2 value, etc. The brightness of the screen can be changed. It has a small, light design which allows for easy portability. There are indications and an alarm function for low-voltage and battery capacity. The indicator for the low-voltage appears before the device begins working abnormally. The upper and down range of the alarm is adjustable. Data can be transmitted to PCs in real-time. Multiuser information is kept continuously , for up to about 24 hours worth of data. A touch key operation makes the device user-friendly.