EL t-shirt 1. CE ROHS approved 2. 100% cotton. 180g fabric 3. 4.26USD-4.87USD 4. sound activated.hight fashion EL t-shirt, sounc activated, more than 100 designs for your choice.Brace yourselves for a new cheesy number has arrived--Sound Activated Flashing T Shirt ! That is a shirt with a built in sound sensitive graphic equalizer. When the music beats, the equalizer moves to the beat of music! ...