... price 2.Works with 4 x AAA batteries, with on/off feature .3.180g,100%cotton washable T-shirt with EL panel mounted on ... ,XXXL for your free choose7.T-Shirt color available in red, blue, black, white for your free choose8.With on/off feature and ... up.9,Flashing panel is fixed with T-shirt by Velcro, or sew it on T-shirt , when you wash t-shirt, you should take off the ...