Detailed Product Description LED T-shirt instruction : LED santa hat ,LED message hat ,LED message scrolling hat LED5*17 dot matrixSize117*37mmColorEnglish Speed1-9 gradesLum1-9 gradesLanguageEnglishFramesmooth Display model6 types display ,left-right,right-left,up-down,down-up,flash ,pauseCancel functionPress the bottonenterfor seconds ,then it cancle Battery life15-25hours CommunicationKey ...