Each sensor is equipped with an LED that indicates its status according to the following code:
Flashing white: charging
Solid green: battery charged and ready for use
Flashing color: in operation.
During operation the LED of each sensor will light up with its own color and, moreover, to avoid positioning errors on the patient's body, each sensor is associated with a number so that it is uniquely identifiable even in cases of color blindness or discoloration.
A series of 4 metal contacts, on the other hand, allows the internal battery to be recharged when inserted into the charging base
Finally, there is a button that allows the sensor to be reset.