Details: The E-Q is a shirt with a built in sound sensitive spectrum analyzer. As the music beats, the equalizer moves to the beat of the music! Each frequency of music will activate a different equalizer bar, just like the equalizer on your stereo at home! Its a must have accessory for all concerts, parties or even raves! It has a fully functional Electro Luminescence panel with a battery pack that snuggles discretely into a pocket inside the T-shirt. The end result is a tremendous sound sensitive music T-Shirt that commands attention!