... : DC12V A4 Front Opening Double Face Aluminum LED Advertising Sign Panel,Aluminium LED Snap Frame,Aluminum LED Light ... 6mm)FR-4Range of Application:Supermarket, Bar, Hotel, Exhibition Hall, Advertising Display, Hospital, Bank, Chain Store, Restaurant, Airport, Subway, ... Dock, Elevator, Hotel, Bus Stop, Cafe, etc.Certificates: CE, RoHSATTN.: ODM & OEM are ...