The present invention provides a characteristic monitor system for monitoring a characteristic of a user, the system comprising:a remote devicea sensor (410) set supporting a sensor for producing a signal indicative of the characteristic of the userat least one colored marking (12) located on a surface of the sensor set for providing information related to the sensor set or the characteristic of the user anda transmitter (420) coupled to the sensor set for processing signals from the sensor set and transmitting the processed signals to the remote device, wherein the remote device utilizes the received processed signals to determine the characteristic of the user, the transmitter comprising:a light source for shining light on the at least one colored marking of the sensor set,a color sensor for detecting wavelengths reflected and/or refracted from the at least one colored marking due to the light shined on the at least one colored marking, anda processor operatively coupled to the color sensor for determining a color of the at least one colored marking from the detected wavelengths and ascertaining information related to the sensor set or the monitored characteristic corresponding to the determined color.
