Abstract: A control module adapted to connect to an energy source and having a headphone assembly connected to a first end of the control module. The control module further connected to an input wire assembly at a second end of the control module, wherein at least one of the headphone assembly and the input wire assembly is adapted to illuminate upon excitation by the energy source. Methods of operation are also described.

Abstract: A control module, at least a portion of which is adapted to illuminate upon excitation by an energy source, wherein the control module comprises an input port adapted to receive portable audio device signals, an energy source signal, control circuitry configured to measure a first parameter from the audio input. Such a system may be a stand alone module or incorporated with headphones utilizing electroluminescent (EL) display technology, connectable to standard portable audio devices. The assembly may or may not include a display that illuminates using EL capability. Methods of operation are also described.