... Maximum impact advertising of Electronic Writing boardDifference LED Color,difference effects:Electronic writing board specification: Model No.JD35DXJD46DXJD57DXJD66DXJD68DXProduct ... control device patent 6.we can carve your logo on the frame or sheetElectronic writing board ... store, hairdressers, commercial centers, night mrket etc.2.for notice in school, companies, classroom, metrostation, resident ...