A method and apparatus for making a connection with a part of a body to transfer an electromagnetic signal for a predetermined purpose, the apparatus including: a garment including one or more electrode capable of passing the signal to or from the part of the body； and a controller for controlling the nature of or processing the signal dependant on one or more parameters in order to vary the nature of the signal dependant on the purpose； wherein at least one parameter of the one or more parameters is stored on a data storage device included in the garment.
