Sound Activated Red Equalizer Flashing EL Led T-Shirt el sound sensitive t-shirt led sound activated t-shirts Sound Activated Red heart Pattern EL Led Equalizer T-ShirtThis LED EL T-shirt is made of 100% cotton. It has an electro-luminescent panel (EL) across the front that reacts to music and and 'pump' in time with whatever you are listening to. It also gives a visual rhythm guide to others. It ...