Flames! Electroluminescent Sound Sensitive T-Shirts are activated by the sounds around you, such as conversation, music, street noise... or any sound. The sensitivity is easily controlled on the fly with a dial.They light up just like the graphic equalizer on your home or car stereo, grabbing attention from across the party. The flat and flexible electroluminescent panels run practically forever. The battery pack clips to your jeans. Battery pack is removable to allow for hand washing of the shirt.