Washing: 1. Dry Clean or Hand wash 2. Romove power unit before power 3. Do not submerge any part of the flash panel USING: 1. Insert standard 4*AAA batteries 2. Slide switch to operate power 3. Use selector on pack to choose flash pattern 4. Do not bend or apply pressure to the flash panel. Description: 1. Electronec light T-shirt, Sound activated(Sound sensitive/sound responsive)graphic EQ, complete with battery pack/plug-in module. 2. Equalizer is moving according to the sound, when there is sound, EL Panle, red and yellow color will lighting and flashing, when the sound the low, only yellow color is lighting. Size: EL Sheet: 13.8*15CM, 5 flash mode T-Shirt: S, M, L, XL, 100% cotton