... with computor,keep and broadcast circularly the message to attract people's attention. !!!Widely usage1.For ... in school,companies,classroom,station,resident place etc.!!!How to use it? 1.Connect the product with ... the content you want. 3.Send the content to the computor and broadcast it. !!!Feature of ... flashing, cover format ect. 7.Large RAM, allow to exist large information, at least 8 texts, single ...