... design for selection 3)Service: OEM & ODM. EL-T-shirt,Flash LED T-shirt, Fashionable designSpecification:weight: 250gPower supply:two CR2032Operation ... up and down keys5-various animation result,the message can scrolling up,down,left,right and flash,etc6-Input characters by hand7 ... below is availvable for your T-shirt EL-T-shirt,Flash LED T-shirt, Fashionable design