... price 2.Works with 4 x AAA batteries, with on/off feature . 3.180g,100%cotton washable T-shirt with EL ... , blue, black, white for your free choose 8.With on/off feature and a switch to activate up. 9,Flashing panel ... on T-shirt , when you wash t-shirt, you should take off the panel 10,Can be various custom designs and sizes ...