... control equipment2.Maintenance free3.CE,ISO9000,National Invention Patent Indoor horizontal mini trivision sign ,tri-vision display,trivision billboard, trivision ... by miccomputer, joined by motorshaft ,driven by cam or motor ,each trianglar prism turns synchronously or in the form of ... C Guarantee replacement of all free lifelong.D Panasonnic motor, if the motor can not operation in one years ,we will ...