... T-Shirt, ideal for your artwork or logos printed on as promotion T-Shirts,different artwork, same price ... .180g,100%cotton washable T-shirt with EL panel mounted on Velcro patch for easy removal before washing .4.Battery ... blue, black, white for your free choose8.With on/off feature and a switch to activate up.9, ... fixed with T-shirt by Velcro, or sew it on T-shirt , when you wash t-shirt, you ...