... shirt print Specificationssound control el t shirt for promotional!1.Electro luminescent glowing t-shirt2.Cool light,no heat when working3 ... .Turn on the switch,then the sound willl active the electro luminescent panel,make it flashing; 3.Small sound active small ... flashing place,loud sound active big flashing place; 4.The electro luminescent panel flash softly,no shining your eyes; 5.The ...