In a vital sign monitor, Small sensors attached to the body which gives vital sign information such as pulse rate, BP, body temperature, breathing rate(Respiration rate), Oxygen saturation level (spo2) of Someone. Sensors are patches on your skin while others can be clipped on one finger. Today many vital signs monitoring devices have touch screen technology and receive wireless information.
The basic displays show your heart rates, blood pressure and body temperature. More advanced models of vital signs monitor will also demonstrate how much oxygen is carried by your blood or how quickly you breathe, i.e. spo2 and respiration rate. Some may even demonstrate how much pressure your brain is or how much carbon dioxide you breathe. If any of your vital signs are below safe levels, then theirs alarms starts giving beep sounds.